# Tags Input

> Free values as tags over a real text input, sent joined by commas. Enter or a comma makes a tag, a pasted list is split, a duplicate shakes its twin. Caps with data-max, checks emails.

Forms · tags, chips, tokens, email, form · HTML, CSS, vanilla JS · no dependencies · updated 2026-11-04
Demo: https://kodza.dev/components/tags-input/
Source on GitHub: https://github.com/kodza-dev/kodza/tree/main/components/tags-input

## Files

The code below, served as files: byte for byte what the Kodza site copies (the CSS includes its theme guard).

- [`kodza-tags-input.css`](https://kodza.dev/registry/tags-input/kodza-tags-input.css) · 19.1 KB
- [`kodza-tags-input.js`](https://kodza.dev/registry/tags-input/kodza-tags-input.js) · 23.4 KB
- [`kodza-tags-input.html`](https://kodza.dev/registry/tags-input/kodza-tags-input.html) · 0.8 KB · the markup, to adapt and paste into your page

**Can you run shell commands? Download the CSS and the JS, don't retype them.** Retyping costs thousands of tokens and can drop or change lines of the CSS. Put the files where your stack expects them (Use it says where: change the `-o` paths):

```bash
curl -fsSL --create-dirs -o kodza/kodza-tags-input.css https://kodza.dev/registry/tags-input/kodza-tags-input.css
curl -fsSL --create-dirs -o kodza/kodza-tags-input.js https://kodza.dev/registry/tags-input/kodza-tags-input.js
```

Then load the files from your page as Use it shows, instead of pasting the content. The HTML is the part you adapt (text, links, modifiers): paste it from the Code section. Copy the CSS and the JS from the Code section only if you can't run commands, exactly as they are. (Windows PowerShell: `curl.exe`.)

## API

- Root: `.kodza-tags`
- Variables (set them on the root element itself: it declares its own defaults):
  - `--kz-tags-bg: #ffffff`
  - `--kz-tags-fg: #0a0a0a`
  - `--kz-tags-muted: rgba(10, 10, 10, 0.6)`
  - `--kz-tags-line: rgba(10, 10, 10, 0.14)`
  - `--kz-tags-line-hover: rgba(10, 10, 10, 0.3)`
  - `--kz-tags-soft: rgba(10, 10, 10, 0.06)`
  - `--kz-tags-ink: #0a0a0a` — the tags
  - `--kz-tags-on-ink: #ffffff`
  - `--kz-tags-cross-hover: rgba(255, 255, 255, 0.18)`
  - `--kz-tags-error: #0a0a0a` — a message, never colour alone: set a red here if you want one
  - `--kz-tags-height: 64px` — one row of tags
  - `--kz-tags-radius: calc(12px * var(--kz-radius-scale, 1))`
  - `--kz-tags-pad: 16px`
  - `--kz-tags-width: var(--kz-field-width, 420px)`
  - `--kz-tags-duration: 0.35s`
  - `--kz-tags-ease: cubic-bezier(0.22, 1, 0.36, 1)`
- Attributes:
  - `data-max` (e.g. `6`)
- Lifecycle: `kodza:init` / `kodza:destroy` on `document`, with `{ detail: { root } }` to target a container.

## Keyboard

What each key does, by where the focus is. Keep it working when you adapt the HTML: same elements, same classes.

- While a tag is selected (focus in `.kodza-tags__input`, while `.kodza-tags__tag.is-armed` is on the page):
  - `Backspace` / `Delete`: Removes it
  - `ArrowLeft` / `ArrowRight`: The tag before or after; past the last, back to typing
  - `Escape`: Lets go of it
- In the field (focus in `.kodza-tags__input`):
  - `Enter`: Turns the text into a tag (a comma does too)
  - `Backspace` / `ArrowLeft`: At the start of the field, selects the last tag

## Dark mode

The values Kodza uses on a dark background (`#0a0a0a`). For a page that follows the system theme, add them after the component's CSS:

```css
@media (prefers-color-scheme: dark) {
  .kodza-tags {
    --kz-tags-bg: #161616;
    --kz-tags-fg: #f2f2f0;
    --kz-tags-muted: rgba(242, 242, 240, 0.62);
    --kz-tags-line: rgba(255, 255, 255, 0.14);
    --kz-tags-line-hover: rgba(255, 255, 255, 0.3);
    --kz-tags-soft: rgba(255, 255, 255, 0.08);
    --kz-tags-ink: #f2f2f0;
    --kz-tags-on-ink: #0a0a0a;
    --kz-tags-cross-hover: rgba(10, 10, 10, 0.12);
    --kz-tags-error: #f2f2f0;
  }
}
```

A site with its own theme switch puts the same rules under its dark selector instead (`[data-theme="dark"] .kodza-tags { … }`); a single dark section, under that section's class.

## Use it

### Plain HTML page

- CSS: `kodza/kodza-tags-input.css` next to the page (the Files commands as they are), linked in `<head>`: `<link rel="stylesheet" href="kodza/kodza-tags-input.css">`. Without a shell, paste it in a `<style>` in `<head>` instead. It only touches `kodza-` classes.
- HTML: where the component goes. Paste it as many times as you need: instances never interfere.
- JS: `kodza/kodza-tags-input.js`, loaded with `<script src="kodza/kodza-tags-input.js" defer></script>` in `<head>`. Without a shell, paste it in a `<script>` before `</body>` (or in `<head>`: it waits for the page). One copy per page, whatever the number of instances.
- Restyle with the `--kz-…` variables, set on the component's root element itself (the root declares its own defaults, so a value on an ancestor is ignored), and with the modifiers / attributes listed under API.
- Font: it takes the page's own. A site with its own type sets it once for every Kodza component, on `:root`, never by editing the CSS (unset, nothing changes): `--kz-font-label`, the face of the small labels (meta, captions, counters, hints, footer links, button labels); `--kz-font-label-size`, their size, one for all of them (`11px`…); `--kz-font-label-weight`, their weight; `--kz-font-label-tracking`, their letter-spacing; `--kz-font-label-case`, their case (`uppercase`…; code and units keep theirs); `--kz-font-label-leading`, their line-height (`1.45`…; buttons, pills and keys keep their box); `--kz-font-mono`, the monospace face (code, labels, counters). The Kodza look is Geist: `<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap">`.
- Corners: a site with its own shapes sets them once for every Kodza component, on `:root`, never by editing the CSS (unset, nothing changes): `--kz-radius-scale` multiplies every corner (`0` square, `0.5` softer, `1` Kodza); `--kz-radius-pill` sets the pills (`0` squares them).
- Width: a form sets it once for every Kodza field, on the form or on `:root` (`--kz-field-width: 100%` fills the column). Unset, nothing changes.
- Motion: a site sets its pace once for every Kodza component, on `:root`, never by editing the CSS or the JS: `--kz-motion-scale` multiplies every duration (`0.5` twice as fast, `2` twice as slow, `0` no motion at all, loops stopped, like reduced motion). Unset, nothing changes.
- Content added later (AJAX navigation, a SPA route, a builder preview): start it with `document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: container } }))`; before removing it, the same call with `'kodza:destroy'` stops it and puts the original markup back.

### Claude artifact (claude.ai)

- Paste the CSS in a `<style>` and the JS in a `<script>` at the end, in the artifact itself: it loads stylesheets only from Google Fonts and scripts only from a few CDNs, so no `<link>` or `<script src>` to Kodza.
- Writing the artifact file with a shell? Insert the downloaded files (Files) with a command instead of retyping them: a line `KODZA-CSS` alone inside the `<style>`, `KODZA-JS` inside the `<script>`, then `sed -e '/^KODZA-CSS$/{r kodza/kodza-tags-input.css' -e 'd' -e '}' -e '/^KODZA-JS$/{r kodza/kodza-tags-input.js' -e 'd' -e '}' page.html > artifact.html`.
- Font: load Geist from Google Fonts (allowed): `<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap">`. A site with its own type sets it once for every Kodza component, on `:root`, never by editing the CSS (unset, nothing changes): `--kz-font-label`, the face of the small labels (meta, captions, counters, hints, footer links, button labels); `--kz-font-label-size`, their size, one for all of them (`11px`…); `--kz-font-label-weight`, their weight; `--kz-font-label-tracking`, their letter-spacing; `--kz-font-label-case`, their case (`uppercase`…; code and units keep theirs); `--kz-font-label-leading`, their line-height (`1.45`…; buttons, pills and keys keep their box); `--kz-font-mono`, the monospace face (code, labels, counters).
- Corners: a site with its own shapes sets them once for every Kodza component, on `:root`, never by editing the CSS (unset, nothing changes): `--kz-radius-scale` multiplies every corner (`0` square, `0.5` softer, `1` Kodza); `--kz-radius-pill` sets the pills (`0` squares them).
- Width: a form sets it once for every Kodza field, on the form or on `:root` (`--kz-field-width: 100%` fills the column). Unset, nothing changes.
- Motion: a site sets its pace once for every Kodza component, on `:root`, never by editing the CSS or the JS: `--kz-motion-scale` multiplies every duration (`0.5` twice as fast, `2` twice as slow, `0` no motion at all, loops stopped, like reduced motion). Unset, nothing changes.
- Dark mode: the viewer sets `data-theme="dark"` or `"light"` on `<html>`, or nothing when it follows the system. Write the Dark mode rules twice: inside `@media (prefers-color-scheme: dark)` with `:root:not([data-theme="light"])` in front of each selector, and with `:root[data-theme="dark"]` in front of each selector.
- Forms: there is nowhere to send them. Handle `submit` in your script with `event.preventDefault()` and show the result in the page.

### WordPress

- HTML: a **Custom HTML** block (or a pattern / template part). WordPress keeps this markup as it is only for users allowed to post unfiltered HTML (Administrators; Super Admins on multisite): for anyone else it strips tags such as `<svg>`, `<input>` or `<dialog>`, so add it from the theme (a pattern or template part) instead.
- CSS and JS: the downloaded files go in the theme, under `wp-content/themes/<your-theme>/kodza/` (the child theme if there is one), enqueued from its functions.php (or a code-snippets plugin):
  ```php
  add_action('wp_enqueue_scripts', function () {
    $dir = get_stylesheet_directory() . '/kodza/';
    $uri = get_stylesheet_directory_uri() . '/kodza/';
    wp_enqueue_style('kodza-tags-input', $uri . 'kodza-tags-input.css', [], filemtime($dir . 'kodza-tags-input.css'));
    wp_enqueue_script('kodza-tags-input', $uri . 'kodza-tags-input.js', [], filemtime($dir . 'kodza-tags-input.js'), true);
  });
  ```
  Scoped to `kodza-` classes, the CSS never touches the theme. One copy of the JS, whatever the number of blocks.
- No access to the theme files? The CSS can also go, as it is, in **Appearance → Customize → Additional CSS** (classic theme) or **Styles → Additional CSS** in the Site Editor (block theme).
- Theme with AJAX page transitions: fire `kodza:init` on the new content after each swap (and `kodza:destroy` on the old one).
- Performance plugin (WP Rocket, LiteSpeed Cache, Perfmatters…) with **Delay JavaScript execution** turned on: add `kodza` to the scripts it must not delay. Otherwise the component waits for the visitor's first scroll, tap or mouse move, and that first click can be lost.
- Colours: by default, match the theme's palette. After the component's CSS, point these variables at the theme's colours, on the component root, Kodza's value as the fallback:
  `.kodza-tags { --kz-tags-fg: var(TEXT, #0a0a0a); --kz-tags-bg: var(BACKGROUND, #ffffff); --kz-tags-ink: var(ACCENT, #0a0a0a); --kz-tags-on-ink: var(BACKGROUND, #ffffff); }`
  TEXT, BACKGROUND and ACCENT (the colour the theme fills its own buttons with) are the theme's own colour variables — block themes (theme.json, like Twenty Twenty-Five): `--wp--preset--color--contrast`, `--wp--preset--color--base`, `--wp--preset--color--contrast` (they fill their buttons with it; their accent-1… colours are decorative); Astra: `--ast-global-color-2`, `--ast-global-color-4`, `--ast-global-color-0`; Kadence: `--global-palette3`, `--global-palette9`, `--global-palette1`; GeneratePress: `--contrast`, `--base-3`, `--accent`; Blocksy: `--theme-palette-color-4`, `--theme-palette-color-8`, `--theme-palette-color-1`. Use only these names, and only if the site really has them (the theme's CSS, or Styles → Colors): the `--wp--preset--color--black`, `--white`, `--vivid-…` that WordPress adds everywhere are not the theme's palette. Another theme, or one without these variables (Hello Elementor, OceanWP): leave the variables alone, it keeps Kodza's monochrome; same when the developer asks for monochrome or the Kodza look. Leave the translucent greys (`rgba(10, 10, 10, …)`) as they are: they suit any light background. On a dark palette, set the other variables from Dark mode too.
- WordPress turns straight quotes and `--` into typographic ones in the text of a Custom HTML block (not inside `<code>` or `<pre>`).

#### With Elementor

- HTML: an **HTML** widget (Elementor shows it to administrators only). It keeps the code exactly as pasted, straight quotes included.
- CSS and JS: as above. Elementor's Site Settings → Theme Style styles every button, field, link and image of the page, components included; the theme guard at the end of the CSS keeps the component's buttons, fields and link colours as they are.
- The Elementor editor redraws each widget after the page has loaded: without the script below, the component stays still in the editor preview (the published page works). Add it once per site, in the footer like the component's script (`kodza/elementor-editor.js`, or a code-snippets plugin):

```js
// Kodza in the Elementor editor: the editor redraws each HTML widget after the page has loaded.
// Start Kodza in what it draws, stop it in what it replaces or removes. Once per site.
window.addEventListener('elementor/frontend/init', () => {
  if (!elementorFrontend.isEditMode()) return;
  class KodzaWidget extends elementorModules.frontend.handlers.Base {
    onInit() {
      super.onInit();
      this.kodza = [...this.$element[0].children];
      document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: this.$element[0] } }));
    }
    onDestroy() {
      super.onDestroy();
      this.kodza.forEach((root) => document.dispatchEvent(new CustomEvent('kodza:destroy', { detail: { root } })));
    }
  }
  elementorFrontend.elementsHandler.attachHandler('html', KodzaWidget);
});
```

- No child theme: everything can go in the HTML widget instead, `<style>` with the CSS, the HTML, then `<script>` with the JS. It works on the page and in the editor without the script above.

### Shopify

- Files: `assets/kodza-tags-input.css` and `assets/kodza-tags-input.js` (the Files commands with `-o assets/…`).
- In the section: `{{ 'kodza-tags-input.css' | asset_url | stylesheet_tag }}` and `<script src="{{ 'kodza-tags-input.js' | asset_url }}" defer></script>`, then the HTML.
- The theme editor re-renders sections: restart them with
  `document.addEventListener('shopify:section:load', (e) => document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: e.target } })));`
  and the same with `shopify:section:unload` → `kodza:destroy`.

### React / Next.js

- Files, side by side (e.g. in `components/kodza/`): `TagsInput.tsx` (below), the CSS block under Code saved as `tags-input.css` and the JS block as `tags-input.js`, both as they are. The HTML block is already inside the component: skip it.
- Use it: `import { TagsInput } from '@/components/kodza/TagsInput';` then `<TagsInput />`. Props: `max` (`data-max`: "6"), `vars` (the `--kz-…` variables listed under API, e.g. `vars={{ '--kz-tags-bg': … }}`), `className`, `style` and the other props of its `<div>` (`onClick`, `aria-…`).
- Next.js App Router: it is a Client Component already (`'use client'`). Pages Router: Next.js takes global CSS only in `pages/_app`, so move the `import './tags-input.css'` line there.
- Safe under StrictMode, client-side navigation and prop changes: when a prop changes, the `key` gives React a fresh element, `kodza:destroy` stops the script on the old one and `kodza:init` starts it on the new one.
- Built from your data (tabs, rows, options)? Add what the markup is made of to the `key`, as plain values (ids, text, numbers). What the visitor changes (the open tab, the sort, what they type) is the script's: follow it with `onClick` or `onInput` on the root, and change it from your code as a visitor would (click the tab; set the field's value, then dispatch a bubbling `input` event). Fields stay uncontrolled (`defaultValue`, `name`).

```tsx
'use client';
// Kodza — Tags Input, for React. From https://kodza.dev/components/tags-input/
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Next to this file: tags-input.css and tags-input.js, the component's CSS and JS from Kodza, as they are.
// Yours to edit: the markup is plain JSX below.
// The script changes this markup once React has rendered it (it adds layers, splits text, moves
// nodes), so React must not patch it afterwards. When a prop changes, the key gives React a fresh
// element: kodza:destroy stops the script on the old one, kodza:init starts it on the new one.
// data-kodza-manual keeps the script from starting it on its own: the effect below does, once
// React has hydrated the markup (on a page that streams in, the script can load first).
// Built from your data (tabs, rows, options)? Put what the markup is made of in the key, as plain
// values (ids, text, numbers): a change starts the script again on fresh markup. What the visitor
// changes (the open tab, the sort, what they type) is the script's: keep it out of the key, follow
// it with onClick or onInput on the root, and change it from your code as a visitor would (click
// the tab; set the field's value, then dispatch a bubbling input event).
import { useRef, useEffect, type ComponentPropsWithoutRef, type ComponentRef, type CSSProperties } from 'react';
import './tags-input.css';

export type TagsInputProps = Omit<ComponentPropsWithoutRef<'div'>, "children" | "vars" | "max"> & {
  /** data-max on the root (default: 6) */
  max?: "6";
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #ffffff */
    "--kz-tags-bg"?: string | number;
    /** default: #0a0a0a */
    "--kz-tags-fg"?: string | number;
    /** default: rgba(10, 10, 10, 0.6) */
    "--kz-tags-muted"?: string | number;
    /** default: rgba(10, 10, 10, 0.14) */
    "--kz-tags-line"?: string | number;
    /** default: rgba(10, 10, 10, 0.3) */
    "--kz-tags-line-hover"?: string | number;
    /** default: rgba(10, 10, 10, 0.06) */
    "--kz-tags-soft"?: string | number;
    /** the tags — default: #0a0a0a */
    "--kz-tags-ink"?: string | number;
    /** default: #ffffff */
    "--kz-tags-on-ink"?: string | number;
    /** default: rgba(255, 255, 255, 0.18) */
    "--kz-tags-cross-hover"?: string | number;
    /** a message, never colour alone: set a red here if you want one — default: #0a0a0a */
    "--kz-tags-error"?: string | number;
    /** one row of tags — default: 64px */
    "--kz-tags-height"?: string | number;
    /** default: calc(12px * var(--kz-radius-scale, 1)) */
    "--kz-tags-radius"?: string | number;
    /** default: 16px */
    "--kz-tags-pad"?: string | number;
    /** default: var(--kz-field-width, 420px) */
    "--kz-tags-width"?: string | number;
    /** default: 0.35s */
    "--kz-tags-duration"?: string | number;
    /** default: cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-tags-ease"?: string | number;
  };
  className?: string;
};

export function TagsInput({ max = "6", vars, className, style, ...rest }: TagsInputProps) {
  const ref = useRef<ComponentRef<'div'>>(null);
  const classes = ["kodza-tags", className].filter(Boolean).join(' ');
  // Everything the markup is made of: when it changes, React gets a fresh element (see the top)
  const key = JSON.stringify([classes, max, vars, style, rest]);

  // Starts the script on this element once React has rendered it, stops it when it goes
  useEffect(() => {
    const root = ref.current;
    let live = true;
    // @ts-ignore: a plain script, no types to find
    import('./tags-input.js').then(() => {
      if (live) document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root } }));
    });
    return () => {
      live = false;
      document.dispatchEvent(new CustomEvent('kodza:destroy', { detail: { root } }));
    };
  }, [key]);

  return (
    <div key={key} {...rest} className={classes} data-kodza-manual data-max={max} style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <label className="kodza-tags__box">
        <span className="kodza-tags__label">Keywords</span>
        {' '}
        <input className="kodza-tags__native" type="text" name="keywords" defaultValue="css, no build step" autoComplete="off" />
      </label>
      <p className="kodza-tags__note">
        <span className="kodza-tags__hint">Enter or a comma. No dupes.</span>
        {' '}
        <span className="kodza-tags__error" aria-live="polite" />
      </p>
    </div>
  );
}
```

## Code

```html
<div class="kodza-tags" data-max="6">
  <label class="kodza-tags__box">
    <span class="kodza-tags__label">Keywords</span>
    <input class="kodza-tags__native" type="text" name="keywords" value="css, no build step" autocomplete="off">
  </label>
  <p class="kodza-tags__note">
    <span class="kodza-tags__hint">Enter or a comma. No dupes.</span>
    <span class="kodza-tags__error" aria-live="polite"></span>
  </p>
</div>

<div class="kodza-tags">
  <label class="kodza-tags__box">
    <span class="kodza-tags__label">Invite your team</span>
    <input class="kodza-tags__native" type="email" name="invite" value="amara@studio.dev" multiple autocomplete="off">
  </label>
  <p class="kodza-tags__note">
    <span class="kodza-tags__hint">Paste the whole list. We split it.</span>
    <span class="kodza-tags__error" aria-live="polite"></span>
  </p>
</div>
```

```css
/* Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license */
/* Kodza — Tags Input
   Free values as tags, over a real text input (the form gets them joined by commas). Enter or
   a comma turns the typed word into a tag: the ink sweeps over it, left to right, as it settles
   into its pill, and the field makes room. A pasted list gives one tag per item; a value
   already there shakes its tag instead of coming twice. Backspace on the empty field selects
   the last tag, a second one removes it. data-max caps the count, shown top right; on an email
   input each address is checked first. Without JS, the native input stays, styled. Same box
   and same tags as Multi Select.
   Everything is tuned with the --kz-tags-* variables; the words and timings, at the top of the
   script. */
.kodza-tags {
  --kz-tags-bg: #ffffff;
  --kz-tags-fg: #0a0a0a;
  --kz-tags-muted: rgba(10, 10, 10, 0.6);
  --kz-tags-line: rgba(10, 10, 10, 0.14);
  --kz-tags-line-hover: rgba(10, 10, 10, 0.3);
  --kz-tags-soft: rgba(10, 10, 10, 0.06);
  --kz-tags-ink: #0a0a0a; /* the tags */
  --kz-tags-on-ink: #ffffff;
  --kz-tags-cross-hover: rgba(255, 255, 255, 0.18);
  --kz-tags-error: #0a0a0a; /* a message, never colour alone: set a red here if you want one */
  --kz-tags-height: 64px; /* one row of tags */
  --kz-tags-radius: calc(12px * var(--kz-radius-scale, 1));
  --kz-tags-pad: 16px;
  --kz-tags-width: var(--kz-field-width, 420px);
  --kz-tags-duration: 0.35s;
  --kz-tags-ease: cubic-bezier(0.22, 1, 0.36, 1);

  position: relative;
  display: grid;
  gap: 8px;
  width: 100%;
  max-width: var(--kz-tags-width);
  color: var(--kz-tags-fg);
}

/* The box: label on top, tags below (or the native input, without the script) */
.kodza-tags__box {
  position: relative;
  display: block;
  box-sizing: border-box;
  min-height: var(--kz-tags-height);
  margin: 0;
  padding: 0;
  border-radius: var(--kz-tags-radius);
  background: var(--kz-tags-bg);
  box-shadow: inset 0 0 0 1px var(--kz-tags-line);
  cursor: text;
  transition: box-shadow calc(0.25s * var(--kz-motion-scale, 1)) ease;
}

.kodza-tags__box:hover {
  box-shadow: inset 0 0 0 1px var(--kz-tags-line-hover);
}

.kodza-tags__box:focus-within {
  box-shadow: inset 0 0 0 1.5px var(--kz-tags-fg), 0 0 0 4px var(--kz-tags-soft);
}

.kodza-tags.is-invalid .kodza-tags__box {
  box-shadow: inset 0 0 0 1.5px var(--kz-tags-error);
}

.kodza-tags.is-invalid .kodza-tags__box:focus-within {
  box-shadow: inset 0 0 0 1.5px var(--kz-tags-error), 0 0 0 4px var(--kz-tags-soft);
}

.kodza-tags.is-disabled .kodza-tags__box {
  opacity: 0.5;
  cursor: not-allowed;
}

.kodza-tags__label {
  position: absolute;
  top: 10px;
  left: var(--kz-tags-pad);
  z-index: 1;
  color: var(--kz-tags-muted);
  font-size: 12px;
  line-height: 1;
  pointer-events: none;
  transform-origin: left top;
  transition: transform calc(var(--kz-tags-duration) * var(--kz-motion-scale, 1)) var(--kz-tags-ease);
}

/* No tag and nothing typed: the label sits in the field at the size of a value, as in Text
   Field, and rises when the field takes the focus */
.kodza-tags.is-empty .kodza-tags__box:not(:focus-within) .kodza-tags__label {
  transform: translateY(calc(var(--kz-tags-height) / 2 - 17.5px)) scale(1.25);
}

/* The count, when there is a cap (data-max): it turns to ink once full */
.kodza-tags__count {
  position: absolute;
  top: 10px;
  right: var(--kz-tags-pad);
  z-index: 1;
  display: flex;
  color: var(--kz-tags-muted);
  font-family: var(--kz-font-label, var(--kz-font-mono, ui-monospace, "SF Mono", Menlo, monospace));
  font-size: var(--kz-font-label-size, 11px);
  font-weight: var(--kz-font-label-weight, 400);
  letter-spacing: var(--kz-font-label-tracking, inherit);
  line-height: 12px;
  font-variant-numeric: tabular-nums;
  pointer-events: none;
  transition: color calc(0.25s * var(--kz-motion-scale, 1)) ease;
}

.kodza-tags__count.is-full {
  color: var(--kz-tags-fg);
}

/* The number rolls: the old one leaves as the new one comes in, in the same cell */
.kodza-tags__now {
  display: inline-grid;
  overflow: hidden;
}

.kodza-tags__now > span {
  grid-area: 1 / 1;
  text-align: right;
}

/* Without the script: the native input, styled like the field */
.kodza-tags__native {
  display: block;
  box-sizing: border-box;
  width: 100%;
  height: var(--kz-tags-height);
  margin: 0;
  padding: calc(var(--kz-tags-height) - 31px) var(--kz-tags-pad) 9px;
  border: 0;
  border-radius: inherit;
  outline: none;
  background: transparent;
  box-shadow: none;
  color: inherit;
  font: inherit;
  font-size: 15px;
  line-height: 22px;
  appearance: none;
}

/* Enhanced: the native input steps back (still in the form), the tags take its place */
.kodza-tags.is-ready .kodza-tags__native {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  clip-path: inset(50%);
}

/* The field: the tags, then the text input where the next one is typed, wrapping */
.kodza-tags__field {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  box-sizing: border-box;
  min-height: var(--kz-tags-height);
  padding: 28px 12px 8px;
  isolation: isolate;
}

.kodza-tags__tag {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  box-sizing: border-box;
  max-width: 100%;
  height: 28px;
  padding: 0 4px 0 10px;
  border-radius: var(--kz-radius-pill, 999px);
  background: var(--kz-tags-ink);
  color: var(--kz-tags-on-ink);
  font-family: var(--kz-font-label, inherit);
  font-size: var(--kz-font-label-size, 13px);
  font-weight: var(--kz-font-label-weight, 500);
  letter-spacing: var(--kz-font-label-tracking, inherit);
  line-height: 28px;
  text-transform: var(--kz-font-label-case, inherit);
  white-space: nowrap;
  cursor: default;
  transform-origin: left center;
  transition: box-shadow calc(0.2s * var(--kz-motion-scale, 1)) ease;
}

/* An address keeps its case, whatever the labels of the site do */
.kodza-tags.is-email .kodza-tags__tag,
.kodza-tags.is-email .kodza-tags__ghost {
  text-transform: none;
}

/* Selected (Backspace or the arrows, or a click): the next Backspace removes it */
.kodza-tags__tag.is-armed {
  box-shadow: 0 0 0 2px var(--kz-tags-bg), 0 0 0 3.5px var(--kz-tags-ink);
}

.kodza-tags__text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.kodza-tags__remove {
  display: grid;
  flex: none;
  place-items: center;
  width: 20px;
  height: 20px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: none;
  color: inherit;
  cursor: pointer;
  opacity: 0.7;
  transition:
    opacity calc(0.2s * var(--kz-motion-scale, 1)) ease,
    background-color calc(0.2s * var(--kz-motion-scale, 1)) ease;
}

.kodza-tags__remove:hover {
  background: var(--kz-tags-cross-hover);
  opacity: 1;
}

.kodza-tags__remove:disabled {
  cursor: not-allowed;
}

.kodza-tags__remove svg {
  display: block;
  width: 10px;
  height: 10px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

/* The typed word, as it was, just ahead of the ink while a new tag sweeps in */
.kodza-tags__ghost {
  position: absolute;
  z-index: 0;
  box-sizing: border-box;
  height: 28px;
  padding: 0 28px 0 10px;
  overflow: hidden;
  color: var(--kz-tags-fg);
  font-family: var(--kz-font-label, inherit);
  font-size: var(--kz-font-label-size, 13px);
  font-weight: var(--kz-font-label-weight, 500);
  letter-spacing: var(--kz-font-label-tracking, inherit);
  line-height: 28px;
  text-transform: var(--kz-font-label-case, inherit);
  white-space: nowrap;
  transform-origin: left center;
  pointer-events: none;
}

/* Narrow at least: the caret stays on the tags' row as long as a few letters fit */
.kodza-tags__input {
  flex: 1 0 44px;
  box-sizing: border-box;
  min-width: 44px;
  height: 28px;
  margin: 0;
  padding: 0 4px;
  border: 0;
  border-radius: 0;
  outline: none;
  background: transparent;
  box-shadow: none;
  color: inherit;
  font: inherit;
  font-size: 15px;
  line-height: 28px;
  letter-spacing: inherit;
  caret-color: var(--kz-tags-fg);
  appearance: none;
}

.kodza-tags__input::placeholder {
  color: transparent;
  opacity: 1;
  transition: color calc(0.2s * var(--kz-motion-scale, 1)) ease;
}

.kodza-tags__input:focus::placeholder {
  color: var(--kz-tags-muted);
}

.kodza-tags__input:disabled {
  cursor: not-allowed;
}

/* Hint and error share one line: the hint steps out upward as the error rises in */
.kodza-tags__note {
  display: grid;
  margin: 0;
  padding: 0 2px;
  overflow: hidden;
  font-family: var(--kz-font-label, inherit);
  font-size: var(--kz-font-label-size, 13px);
  font-weight: var(--kz-font-label-weight, inherit);
  letter-spacing: var(--kz-font-label-tracking, inherit);
  line-height: var(--kz-font-label-leading, 1.4);
  text-transform: var(--kz-font-label-case, inherit);
}

.kodza-tags__hint,
.kodza-tags__error {
  grid-area: 1 / 1;
  transition:
    opacity calc(var(--kz-tags-duration) * 0.625 * var(--kz-motion-scale, 1)) ease,
    transform calc(var(--kz-tags-duration) * var(--kz-motion-scale, 1)) var(--kz-tags-ease);
}

.kodza-tags__hint {
  color: var(--kz-tags-muted);
}

.kodza-tags__error {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--kz-tags-error);
  font-weight: var(--kz-font-label-weight, 500);
  opacity: 0;
  transform: translateY(100%);
}

.kodza-tags__error::before {
  content: "";
  flex: none;
  width: 14px;
  height: 14px;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='8' cy='8' r='6.5' fill='none' stroke='black' stroke-width='1.5'/%3E%3Cpath d='M8 4.5v4.2M8 10.9v.1' stroke='black' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='8' cy='8' r='6.5' fill='none' stroke='black' stroke-width='1.5'/%3E%3Cpath d='M8 4.5v4.2M8 10.9v.1' stroke='black' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E") center / contain no-repeat;
}

.kodza-tags.is-invalid .kodza-tags__hint {
  opacity: 0;
  transform: translateY(-100%);
}

.kodza-tags.is-invalid .kodza-tags__error {
  opacity: 1;
  transform: none;
}

/* What screen readers hear: a tag added, removed, already there */
.kodza-tags__live {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-tags__box,
  .kodza-tags__label,
  .kodza-tags__count,
  .kodza-tags__tag,
  .kodza-tags__remove,
  .kodza-tags__input::placeholder,
  .kodza-tags__hint,
  .kodza-tags__error {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

/* Theming example — on a dark background:
.dark-section .kodza-tags {
  --kz-tags-bg: #161616;
  --kz-tags-fg: #f2f2f0;
  --kz-tags-muted: rgba(242, 242, 240, 0.62);
  --kz-tags-line: rgba(255, 255, 255, 0.14);
  --kz-tags-line-hover: rgba(255, 255, 255, 0.3);
  --kz-tags-soft: rgba(255, 255, 255, 0.08);
  --kz-tags-ink: #f2f2f0;
  --kz-tags-on-ink: #0a0a0a;
  --kz-tags-cross-hover: rgba(10, 10, 10, 0.12);
  --kz-tags-error: #f2f2f0;
}
*/

/* kodza-guard 62c8eab045d9 — generated by Kodza, do not edit.
   Theme guard: keeps a site's own CSS (WordPress themes, Bootstrap, CSS resets…) off this
   component. :not(#_) is always true and weighs as much as an id, so these lines win over
   theme rules made of classes and tags. Customise the component through its --kz-* variables. */

/* What the browser gives, where the component sets it only in some states: at the lowest weight, so its own rules below put it back */

:where(.kodza-tags__native):not(#_) {
  position: revert;
}

/* What the browser gives, on everything the component leaves to it */

.kodza-tags:not(#_),
.kodza-tags__label:not(#_),
.kodza-tags__text:not(#_),
.kodza-tags__count:not(#_),
.kodza-tags__now:not(#_),
.kodza-tags__hint:not(#_),
.kodza-tags__error:not(#_),
.kodza-tags__live:not(#_),
.kodza-tags__now span:where(:not([class*="kodza-"])):not(#_) {
  box-sizing: revert;
}

.kodza-tags__box:not(#_) {
  border: revert;
  outline: revert;
  text-decoration: revert;
  list-style: revert;
  float: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-tags__native:not(#_) {
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  float: revert;
  outline-offset: revert;
  max-width: revert;
  max-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-tags__remove:not(#_) {
  outline: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-tags__input:not(#_) {
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  float: revert;
  position: revert;
  outline-offset: revert;
  max-width: revert;
  max-height: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-tags__note:not(#_) {
  border: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-style: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-tags__remove svg:where(:not([class*="kodza-"])):not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-tags__input:not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-tags__input:not(#_):where([hidden]) {
  display: none;
}

.kodza-tags__error:not(#_)::before {
  box-sizing: revert;
}

/* The component's own rules, one step stronger: real buttons and fields, what it sets on tags themes style (links, lists, headings, images…), and the root width (a theme may narrow it, never widen it) */

.kodza-tags:not(#_) {
  width: min(100%, var(--kz-tags-width));
}

.kodza-tags__box:not(#_) {
  position: relative;
  display: block;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: var(--kz-tags-radius);
  background: var(--kz-tags-bg);
  box-shadow: inset 0 0 0 1px var(--kz-tags-line);
  transition: box-shadow calc(0.25s * var(--kz-motion-scale, 1)) ease;
}

.kodza-tags__box:hover:not(#_) {
  box-shadow: inset 0 0 0 1px var(--kz-tags-line-hover);
}

.kodza-tags__box:focus-within:not(#_) {
  box-shadow: inset 0 0 0 1.5px var(--kz-tags-fg), 0 0 0 4px var(--kz-tags-soft);
}

.kodza-tags.is-invalid .kodza-tags__box:not(#_) {
  box-shadow: inset 0 0 0 1.5px var(--kz-tags-error);
}

.kodza-tags.is-invalid .kodza-tags__box:focus-within:not(#_) {
  box-shadow: inset 0 0 0 1.5px var(--kz-tags-error), 0 0 0 4px var(--kz-tags-soft);
}

.kodza-tags__native:not(#_) {
  display: block;
  box-sizing: border-box;
  width: 100%;
  height: var(--kz-tags-height);
  margin: 0;
  padding: calc(var(--kz-tags-height) - 31px) var(--kz-tags-pad) 9px;
  border: 0;
  border-radius: inherit;
  outline: none;
  background: transparent;
  box-shadow: none;
  color: inherit;
  font: inherit;
  font-size: 15px;
  line-height: 22px;
  appearance: none;
}

.kodza-tags.is-ready .kodza-tags__native:not(#_) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  clip-path: inset(50%);
}

.kodza-tags__remove:not(#_) {
  display: grid;
  flex: none;
  place-items: center;
  width: 20px;
  height: 20px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: none;
  color: inherit;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity calc(0.2s * var(--kz-motion-scale, 1)) ease,
    background-color calc(0.2s * var(--kz-motion-scale, 1)) ease;
}

.kodza-tags__remove:hover:not(#_) {
  background: var(--kz-tags-cross-hover);
  opacity: 1;
}

.kodza-tags__remove:disabled:not(#_) {
  cursor: not-allowed;
}

.kodza-tags__remove svg:not(#_) {
  display: block;
}

.kodza-tags__input:not(#_) {
  flex: 1 0 44px;
  box-sizing: border-box;
  min-width: 44px;
  height: 28px;
  margin: 0;
  padding: 0 4px;
  border: 0;
  border-radius: 0;
  outline: none;
  background: transparent;
  box-shadow: none;
  color: inherit;
  font: inherit;
  font-size: 15px;
  line-height: 28px;
  letter-spacing: inherit;
  caret-color: var(--kz-tags-fg);
  appearance: none;
}

.kodza-tags__input:not(#_)::placeholder {
  color: transparent;
  opacity: 1;
  transition: color calc(0.2s * var(--kz-motion-scale, 1)) ease;
}

.kodza-tags__input:focus:not(#_)::placeholder {
  color: var(--kz-tags-muted);
}

.kodza-tags__input:disabled:not(#_) {
  cursor: not-allowed;
}

.kodza-tags__note:not(#_) {
  display: grid;
  margin: 0;
  padding: 0 2px;
  font-family: var(--kz-font-label, inherit);
  font-size: var(--kz-font-label-size, 13px);
  font-weight: var(--kz-font-label-weight, inherit);
  letter-spacing: var(--kz-font-label-tracking, inherit);
  line-height: var(--kz-font-label-leading, 1.4);
  text-transform: var(--kz-font-label-case, inherit);
}

@media (prefers-reduced-motion: reduce) {
  .kodza-tags__box:not(#_) {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kodza-tags__remove:not(#_),
  .kodza-tags__input:not(#_)::placeholder {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}
```

```js
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Kodza — Tags Input
// Builds a field of tags over the real text input, which the form still sends: the tags joined by
// commas, so type="email" multiple validates them as usual. Enter or a comma turns the typed word
// into a tag: the ink sweeps over the word where it was typed, left to right, as it settles into
// its pill and the field makes room. A pasted list gives one tag per item ("Name <address>" keeps
// the address). A value already there shakes its tag instead of coming twice. Backspace at the
// start of the field selects the last tag, a second one removes it; the arrows walk the tags.
// data-max caps the count, shown top right. On an email input each address is checked first.
// "change" fires on the real input; after setting .value from a script, fire "change" on it.
// The words and timings are below; each word can be set per field with data-text-<name>
// (data-text-max="…"), {value} and {max} are filled in.
(() => {
  const SELECTOR = '.kodza-tags';
  const WORDS = {
    placeholder: 'Type, then Enter', // shown while there is no tag
    duplicate: '“{value}” is already there.', // read out, as its tag shakes
    email: '“{value}” isn’t an email.', // under the field
    max: '{max} max. Drop one first.',
    required: 'Add at least one.',
    added: '{value} added.', // read out
    removed: '{value} removed.',
    selected: '{value} selected. Backspace removes it.',
    remove: 'Remove {value}', // the cross on each tag
  };
  const SEPARATORS = /[,;\n\t]+/; // typed or pasted, they end a tag (spaces too, on an email input)
  const SWEEP = 420; // ms, the ink sweeping over the word as it becomes a tag
  const STAGGER = 70; // ms between the tags of a pasted list
  const GLIDE = 420; // ms, the other tags and the field making room
  const LEAVE = 160; // ms, a removed tag shrinking away
  const SHAKE = 360; // ms, the tag of a value given twice
  const ROLL = 320; // ms, the count rolling to its new number
  const ease = 'cubic-bezier(0.22, 1, 0.36, 1)';
  const sweepEase = 'cubic-bezier(0.65, 0, 0.35, 1)'; // the ink: slow, fast, slow, so the sweep reads

  const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  // The site's pace, --kz-motion-scale (set on :root, read on the instance): every duration of the
  // script times it, and 0 moves nothing, like reduced motion
  const paceOf = (el) => {
    const pace = parseFloat(getComputedStyle(el).getPropertyValue('--kz-motion-scale'));
    return pace >= 0 ? pace : 1;
  };
  const cross = '<svg viewBox="0 0 12 12" aria-hidden="true"><path d="M3 3l6 6M9 3 3 9"/></svg>';
  const fill = (words, values) => words.replace(/\{(\w+)\}/g, (all, key) => (key in values ? values[key] : all));
  // An address as the browser checks it, with a dot in the domain on top ("me@localhost" is valid
  // HTML, rarely what a form wants)
  let probe = null;
  const isEmail = (value) => {
    probe ||= Object.assign(document.createElement('input'), { type: 'email' });
    probe.value = value;
    return probe.checkValidity() && /@[^@.]+(\.[^@.]+)+$/.test(value);
  };
  let uid = 0;

  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    const pace = paceOf(root);
    const still = reduceMotion || !pace; // the still path: no motion asked, by the visitor or the site
    const native = root.querySelector('.kodza-tags__native');
    const box = root.querySelector('.kodza-tags__box');
    const label = root.querySelector('.kodza-tags__label');
    const note = root.querySelector('.kodza-tags__note');
    const error = root.querySelector('.kodza-tags__error');
    if (!native || !box) return;
    const word = (key) => root.dataset[`text${key[0].toUpperCase()}${key.slice(1)}`] || WORDS[key];
    const email = native.type === 'email';
    const max = parseInt(root.dataset.max, 10) || 0;
    const id = `kodza-tags-${++uid}`;
    root.classList.toggle('is-email', email);

    const field = document.createElement('div');
    field.className = 'kodza-tags__field';
    const input = document.createElement('input');
    input.className = 'kodza-tags__input';
    input.type = 'text'; // not "email": the caret position is needed, and an email input hides it
    if (email) input.inputMode = 'email';
    input.autocomplete = 'off';
    input.spellcheck = false;
    input.enterKeyHint = 'enter';
    input.setAttribute('autocapitalize', 'off');
    if (label) {
      label.id = `${id}-label`;
      input.setAttribute('aria-labelledby', label.id);
    }
    if (note) {
      note.id = `${id}-note`;
      input.setAttribute('aria-describedby', note.id);
    }
    field.append(input);
    box.append(field);
    native.tabIndex = -1;
    native.setAttribute('aria-hidden', 'true');
    const live = document.createElement('span');
    live.className = 'kodza-tags__live';
    live.setAttribute('aria-live', 'polite');
    root.append(live);
    const tell = (text) => { live.textContent = text; };

    // The count, top right, when there is a cap: its number rolls up as tags come, down as they go
    let now = null;
    let counted = -1;
    const count = max ? document.createElement('span') : null;
    if (count) {
      count.className = 'kodza-tags__count';
      count.setAttribute('aria-hidden', 'true');
      now = document.createElement('span');
      now.className = 'kodza-tags__now';
      count.append(now, `/${max}`);
      box.append(count);
    }
    const recount = (roll) => {
      if (!count) return;
      const n = tags.length;
      count.classList.toggle('is-full', n >= max);
      if (n === counted) return;
      const up = n > counted;
      counted = n;
      const next = document.createElement('span');
      next.textContent = n;
      // A roll still going when the next one starts: only its last number stays
      const old = now.lastElementChild;
      [...now.children].forEach((el) => el !== old && el.remove());
      if (still || !roll || !old) return now.replaceChildren(next);
      now.append(next);
      const timing = { duration: ROLL * pace, easing: ease };
      old.animate([{ transform: 'none' }, { transform: `translateY(${up ? -100 : 100}%)` }], { ...timing, fill: 'forwards' }).onfinish = () => old.remove();
      next.animate([{ transform: `translateY(${up ? 100 : -100}%)` }, { transform: 'none' }], timing);
    };

    // The values, as typed or pasted: "Name <address>" keeps the address, spaces split addresses
    const split = (raw) => {
      const text = email ? raw.replace(/[^,;<>\n]*<([^<>]+)>/g, '$1,') : raw;
      return text.split(SEPARATORS)
        .flatMap((part) => (email ? part.split(/\s+/) : [part.replace(/\s+/g, ' ')]))
        .map((part) => part.trim())
        .filter(Boolean);
    };
    let tags = [];
    const twinOf = (value) => tags.find((entry) => entry.value.toLowerCase() === value.toLowerCase());

    // The real input follows the tags, and tells the form
    let syncing = false;
    const refresh = () => {
      root.classList.toggle('is-empty', !tags.length && !input.value);
      input.placeholder = tags.length ? '' : word('placeholder');
      input.disabled = native.disabled;
      root.classList.toggle('is-disabled', native.disabled);
      input.setAttribute('aria-required', String(native.required));
      tags.forEach((entry) => { entry.remove.disabled = native.disabled; });
    };
    const write = () => {
      native.value = tags.map((entry) => entry.value).join(email ? ',' : ', ');
      syncing = true;
      native.dispatchEvent(new Event('input', { bubbles: true }));
      native.dispatchEvent(new Event('change', { bubbles: true }));
      syncing = false;
      refresh();
      recount(true);
    };

    // Hint and error share the line under the field
    const say = (text) => {
      if (!error) return;
      error.textContent = text;
      root.classList.add('is-invalid');
      input.setAttribute('aria-invalid', 'true');
    };
    const clearError = () => {
      root.classList.remove('is-invalid');
      input.removeAttribute('aria-invalid');
    };

    // Tags and input glide to their new places, the field eases to its new height
    const glide = (change) => {
      const before = new Map([...field.children].map((el) => [el, el.getBoundingClientRect()]));
      const height = field.offsetHeight;
      change();
      if (still) return;
      const k = field.getBoundingClientRect().width / field.offsetWidth || 1;
      [...field.children].forEach((el) => {
        const a = before.get(el);
        if (!a || el.classList.contains('kodza-tags__ghost')) return;
        const b = el.getBoundingClientRect();
        const dx = (a.left - b.left) / k;
        const dy = (a.top - b.top) / k;
        if (Math.abs(dx) + Math.abs(dy) > 0.5) el.animate([{ transform: `translate(${dx}px, ${dy}px)` }, { transform: 'none' }], { duration: GLIDE * pace, easing: ease });
      });
      const to = field.offsetHeight;
      if (to !== height) field.animate([{ height: `${height}px` }, { height: `${to}px` }], { duration: GLIDE * pace, easing: ease });
    };

    // Selected tag: the next Backspace removes it
    let armed = null;
    const arm = (entry) => {
      if (armed === (entry || null)) return;
      armed?.tag.classList.remove('is-armed');
      armed = entry || null;
      if (!armed) return;
      armed.tag.classList.add('is-armed');
      tell(fill(word('selected'), { value: armed.value }));
    };

    const makeTag = (value) => {
      const tag = document.createElement('span');
      tag.className = 'kodza-tags__tag';
      const text = document.createElement('span');
      text.className = 'kodza-tags__text';
      text.textContent = value;
      text.title = value;
      const remove = document.createElement('button');
      remove.type = 'button';
      remove.className = 'kodza-tags__remove';
      remove.tabIndex = -1;
      remove.setAttribute('aria-label', fill(word('remove'), { value }));
      remove.innerHTML = cross;
      tag.append(text, remove);
      const entry = { value, tag, remove };
      remove.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        drop(entry);
        input.focus();
      }, { signal });
      return entry;
    };

    // The ink sweeps over the word, left to right. Typed: the word stays where it was typed, at
    // the size it was typed, and travels into its pill as the ink covers it (the plain word, a
    // ghost under the tag, shows past the edge of the ink). Pasted: the pill unrolls in place
    const sweep = (entry, from, delay) => {
      if (still) return;
      const { tag } = entry;
      const style = getComputedStyle(tag);
      const w = tag.offsetWidth;
      const radius = style.borderTopLeftRadius;
      const tip = Math.min(parseFloat(radius) || 0, tag.offsetHeight / 2);
      const timing = { duration: SWEEP * pace, delay: delay * pace, easing: sweepEase, fill: 'backwards' };
      const ink = [{ clipPath: `inset(0 ${w}px 0 0 round ${radius})` }, { clipPath: `inset(0 0px 0 0 round ${radius})` }];
      tag.animate(ink, timing);
      if (!from) return;
      const k = field.getBoundingClientRect().width / field.offsetWidth || 1;
      const s = from.size / parseFloat(style.fontSize) || 1;
      const b = tag.getBoundingClientRect();
      const dx = (from.left - b.left) / k - parseFloat(style.paddingLeft) * s;
      const dy = (from.middle - b.top - b.height / 2) / k;
      const start = `translate(${dx}px, ${dy}px) scale(${s})`;
      const ghost = document.createElement('span');
      ghost.className = 'kodza-tags__ghost';
      ghost.setAttribute('aria-hidden', 'true');
      ghost.textContent = entry.value;
      ghost.style.cssText = `left: ${tag.offsetLeft}px; top: ${tag.offsetTop}px; width: ${w}px;`;
      field.append(ghost);
      // The word travels on the arriving curve, the ink keeps its own
      const travel = [{ transform: start }, { transform: 'none' }];
      tag.animate(travel, { ...timing, easing: ease });
      ghost.animate(travel, { ...timing, easing: ease, fill: 'both' });
      // The plain word starts a little under the ink, so its round tip never shows a gap
      ghost.animate([{ clipPath: `inset(0 0 0 ${-tip}px)` }, { clipPath: `inset(0 0 0 ${w - tip}px)` }], { ...timing, fill: 'both' })
        .onfinish = () => ghost.remove();
    };

    const shake = (entry) => {
      if (still) return;
      entry.tag.animate([
        { transform: 'none' },
        { transform: 'translateX(-3px)' },
        { transform: 'translateX(3px)' },
        { transform: 'translateX(-2px)' },
        { transform: 'translateX(1px)' },
        { transform: 'none' },
      ], { duration: SHAKE * pace, easing: 'ease-out' });
    };

    // Text becomes tags: the ones already there shake, the ones refused (not an address, over the
    // cap) stay in the field with the reason under it. `from` is where the text was typed
    const take = (raw, from) => {
      const fresh = [];
      const kept = [];
      let problem = '';
      split(raw).forEach((value) => {
        const twin = twinOf(value) || fresh.find((entry) => entry.value.toLowerCase() === value.toLowerCase());
        if (twin) {
          if (!fresh.includes(twin)) shake(twin);
          tell(fill(word('duplicate'), { value: twin.value }));
          return;
        }
        if (email && !isEmail(value)) {
          kept.push(value);
          problem ||= fill(word('email'), { value });
          return;
        }
        if (max && tags.length + fresh.length >= max) {
          kept.push(value);
          problem ||= fill(word('max'), { max });
          return;
        }
        fresh.push(makeTag(value));
      });
      if (fresh.length) {
        arm(null);
        clearError();
        glide(() => fresh.forEach((entry) => input.before(entry.tag)));
        tags.push(...fresh);
        fresh.forEach((entry, i) => sweep(entry, i ? null : from, i * STAGGER));
        tell(fresh.length === 1 ? fill(word('added'), { value: fresh[0].value }) : fill(word('added'), { value: `${fresh.length} tags` }));
        write();
      }
      if (problem) say(problem);
      return kept;
    };

    // Where the typed text starts, and at what size, before the field is emptied
    const typedAt = () => {
      const r = input.getBoundingClientRect();
      const style = getComputedStyle(input);
      const k = r.width / input.offsetWidth || 1;
      return { left: r.left + (parseFloat(style.paddingLeft) - input.scrollLeft) * k, middle: r.top + r.height / 2, size: parseFloat(style.fontSize) };
    };
    // Everything typed, or what is before the last separator (the rest is still being typed)
    const commit = (all) => {
      const value = input.value;
      const cut = all ? value.length : Math.max(...[...value.matchAll(email ? /[,;\s]/g : /[,;]/g)].map((m) => m.index), -1);
      if (cut < 0) return;
      const rest = value.slice(cut + 1);
      const from = typedAt();
      input.value = '';
      const kept = take(value.slice(0, cut), from);
      input.value = [...kept, rest.trimStart()].filter(Boolean).join(', ');
      refresh();
    };

    const drop = (entry) => {
      const at = tags.indexOf(entry);
      if (at < 0) return;
      tags.splice(at, 1);
      if (armed === entry) arm(null);
      entry.tag.style.pointerEvents = 'none';
      clearError();
      write();
      tell(fill(word('removed'), { value: entry.value }));
      const gone = () => glide(() => entry.tag.remove());
      if (still) return gone();
      entry.tag.animate([{ opacity: 1, transform: 'none' }, { opacity: 0, transform: 'scale(0.6)' }], { duration: LEAVE * pace, easing: 'ease-in', fill: 'forwards' }).onfinish = gone;
    };

    // The tags from the real input, without motion (first start, a reset, a script)
    const read = () => {
      tags.forEach((entry) => entry.tag.remove());
      tags = [];
      armed = null;
      split(native.value).forEach((value) => {
        if (twinOf(value)) return;
        const entry = makeTag(value);
        tags.push(entry);
        input.before(entry.tag);
      });
      refresh();
      recount(false);
    };
    read();

    input.addEventListener('keydown', (event) => {
      if (event.isComposing) return;
      const start = input.selectionStart === 0 && input.selectionEnd === 0;
      const at = tags.indexOf(armed);
      if (event.key === 'Enter') {
        if (!input.value.trim()) return; // nothing typed: the form is sent as usual
        event.preventDefault();
        commit(true);
      } else if (armed && (event.key === 'Backspace' || event.key === 'Delete')) {
        event.preventDefault();
        drop(armed);
      } else if (event.key === 'Backspace' || event.key === 'ArrowLeft') {
        if (armed) {
          event.preventDefault();
          if (at > 0) arm(tags[at - 1]);
        } else if (start && tags.length) {
          event.preventDefault();
          arm(tags[tags.length - 1]);
        }
      } else if (event.key === 'ArrowRight' && armed) {
        event.preventDefault();
        arm(tags[at + 1]);
      } else if (event.key === 'Escape' && armed) {
        event.preventDefault();
        arm(null);
      }
    }, { signal });
    input.addEventListener('input', () => {
      arm(null);
      clearError();
      refresh();
      commit(false); // a comma typed (or put there by a phone keyboard) ends the tag
    }, { signal });
    // A list pasted: one tag per item, joined to what was around the caret
    input.addEventListener('paste', (event) => {
      const text = event.clipboardData?.getData('text') || '';
      if (!SEPARATORS.test(text) && !(email && /\s|</.test(text.trim()))) return;
      event.preventDefault();
      const { value, selectionStart: a, selectionEnd: b } = input;
      input.value = '';
      input.value = take(value.slice(0, a) + text + value.slice(b), null).join(', ');
      refresh();
    }, { signal });
    input.addEventListener('blur', () => {
      arm(null);
      if (input.value.trim()) commit(true);
    }, { signal });

    // A click in the box goes to the input (not to the hidden native one); on a tag, selects it
    box.addEventListener('mousedown', (event) => {
      if (event.target !== input && document.activeElement === input) event.preventDefault();
    }, { signal });
    box.addEventListener('click', (event) => {
      if (event.target === input) return;
      event.preventDefault();
      if (input.disabled) return;
      const tag = event.target.closest('.kodza-tags__tag');
      const entry = tags.find((item) => item.tag === tag);
      input.focus();
      arm(entry && entry !== armed ? entry : null);
    }, { signal });

    // Sent with no tag: the field says it, not the browser's bubble on the hidden input
    native.addEventListener('invalid', (event) => {
      event.preventDefault();
      say(native.validity.valueMissing ? word('required') : native.validationMessage);
      const first = native.form && [...native.form.elements].find((el) => el.willValidate && !el.validity.valid);
      if (!native.form || first === native) input.focus();
    }, { signal });
    // The real input changed from elsewhere (a form reset, a script): follow it
    native.addEventListener('change', () => {
      if (!syncing) read();
    }, { signal });
    native.form?.addEventListener('reset', () => setTimeout(() => {
      input.value = '';
      clearError();
      read();
    }), { signal });
    const observer = new MutationObserver(refresh);
    observer.observe(native, { attributes: true, attributeFilter: ['disabled', 'required'] });
    signal.addEventListener('abort', () => observer.disconnect(), { once: true });
  }

  // Kodza lifecycle, the same in every component: `kodza:init` starts the instances inside
  // event.detail.root (the whole page by default), `kodza:destroy` stops them and puts their
  // markup back. For themes and apps that swap content without a page load. Each running root
  // keeps its markup as written under KODZA, shared by every Kodza script on the page: a Kodza
  // component inside another one is saved as written, not half-started, and stopped with it. Two
  // components on one root (a reveal on a stat card) both start, and stop together.
  const KODZA = Symbol.for('kodza');
  const RUNNING = Symbol.for(`kodza ${SELECTOR}`); // a root this component runs on, for every copy of this script
  const instances = new WeakMap();
  const find = (scope = document) => [scope, ...scope.querySelectorAll(SELECTOR)].filter((el) => el.matches?.(SELECTOR));
  const attrsOf = (el) => [...el.attributes].map((a) => [a.name, a.value]);
  const put = (el, saved) => {
    [...el.attributes].forEach((a) => el.removeAttribute(a.name));
    saved.attrs.forEach(([name, value]) => el.setAttribute(name, value));
    el.innerHTML = saved.html;
  };
  // The markup inside a root as written: Kodza components already running in it give back their own
  const written = (root) => {
    const all = [...root.querySelectorAll('*')];
    if (!all.some((el) => el[KODZA])) return root.innerHTML;
    const copy = root.cloneNode(true);
    const twins = copy.querySelectorAll('*');
    let last = null;
    all.forEach((el, i) => {
      if (!el[KODZA] || last?.contains(el)) return;
      last = el;
      put(twins[i], el[KODZA]);
    });
    return copy.innerHTML;
  };
  const init = (scope) => find(scope).forEach((root) => {
    // Already running, maybe from another copy of this script. Marked is-ready with no Kodza component
    // running on it, a root is a copy of a started one (a cloned slide): it is left as it is
    if (root[RUNNING] || (root.classList.contains('is-ready') && !root[KODZA])) return;
    // Rendered by React (data-kodza-manual): React starts it, with an init aimed at that markup once
    // it has hydrated it. Any earlier start would change markup React has not taken over yet
    const owner = root.closest('[data-kodza-manual]');
    if (owner && !(scope && owner.contains(scope))) return;
    const controller = new AbortController();
    // Another Kodza component already running on this root: its markup as written is kept, and the
    // two stop together
    const before = root[KODZA];
    const saved = { html: before ? before.html : written(root), attrs: before ? before.attrs : attrsOf(root), stop: () => destroy(root) };
    if (before) before.above = saved;
    instances.set(root, { controller, saved, before });
    root[KODZA] = saved;
    root[RUNNING] = true;
    mount(root, controller.signal);
    root.classList.add('is-ready');
  });
  const destroy = (scope) => find(scope).forEach((root) => {
    const instance = instances.get(root);
    if (!instance) return;
    instances.delete(root);
    instance.saved.above?.stop(); // a Kodza component started after it on the same root stops first
    // The Kodza components running inside it stop first: once its markup is put back, their own
    // script could not find them any more
    root.querySelectorAll('*').forEach((el) => el[KODZA]?.stop());
    instance.controller.abort();
    delete root[RUNNING];
    // Started on top of another one: that one stops next, and puts the markup back
    if (instance.before) {
      delete instance.before.above;
      root[KODZA] = instance.before;
      return instance.before.stop();
    }
    delete root[KODZA];
    put(root, instance.saved);
  });
  document.addEventListener('kodza:init', (event) => init(event.detail?.root));
  document.addEventListener('kodza:destroy', (event) => destroy(event.detail?.root));
  init();
  // Loaded in <head>, the script runs before the markup exists: once more when it is parsed
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', () => init(), { once: true });
})();
```

Free to use, from Kodza (https://kodza.dev).