@zerodevx/svelte-toast

v0.9.6

Published

2 months ago

Simple elegant toast notifications

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zerodevx

svelte vanillajs toast notifications

svelte-toast

Simple elegant toast notifications.

A feather-light and well-tested toast notification component for modern web frontends in very little lines of code. Compiled (into UMD), it's only 20kB minified (8kB gzipped) and can be used in Vanilla JS, or as a Svelte component.

Because a demo helps better than a thousand API docs: https://zerodevx.github.io/svelte-toast/

Usage

Install the package:

$ npm i -D @zerodevx/svelte-toast

The following are exported:

SvelteToast as the toast container;
toast as the toast controller.

Svelte

If you're using this in a Svelte app, import the toast container and place it in your app shell or root layout.

+layout.svelte:

<script>
  import { SvelteToast } from '@zerodevx/svelte-toast'

  // Optionally set default options here
  const options = {
    ...
  }
</script>

...
<SvelteToast {options} />

Use anywhere in your app - just import the toast controller.

MyComponent.svelte:

<script>
  import { toast } from '@zerodevx/svelte-toast'
</script>

<button on:click={() => toast.push('Hello world!')}>SHOW TOAST</button>

Vanilla JS

For any other application with a bundler, something like this should work:

// Import the compiled code from `/dist`
import { SvelteToast, toast } from '@zerodevx/svelte-toast/dist'

const app = new SvelteToast({
  // Set where the toast container should be appended into
  target: document.body,
  props: {
    options: {
      // Optionally set default options here
      ...
    }
  }
})

toast.push('Hello world!')

CDN

Or if you prefer to go old-school javascript and a CDN:

<head>
  ...
  <!-- Load `toast` and `SvelteToast` into global scope  -->
  <script src="https://cdn.jsdelivr.net/npm/@zerodevx/svelte-toast@0"></script>
  <!-- Register the app -->
  <script>
    const toastApp = new SvelteToast({
      // Set where the toast container should be appended into
      target: document.body,
      props: {
        options: {
          // Optionally set default options here
          ...
        }
      }
    })

    // Now you can `toast` anywhere!
    toast.push('Hello world!')
  </script>
</head>

Theming

In general, use CSS variables - the following (self-explanatory) vars are exposed:

/**
 *         ._toastContainer
 *    ┌───────────────────────────────────────┐
 *    │    ._toastItem                        │
 *    │ ┌───────────────────────────────────┐ │
 *    │ │  ._toastMsg             ._toastBtn│ │
 *    │ │ ┌───────────────────────┐ ┌─────┐ │ │
 *    │ │ │                       │ │  ✕  │ │ │
 *    │ │ └───────────────────────┘ └─────┘ │ │
 *    │ │  ._toastBar                       │ │
 *    │ │ ═════════════════════════════════ │ │
 *    │ └───────────────────────────────────┘ │
 *    └───────────────────────────────────────┘
 */

._toastContainer {
  top: var(--toastContainerTop, 1.5rem);
  right: var(--toastContainerRight, 2rem);
  bottom: var(--toastContainerBottom, auto);
  left: var(--toastContainerLeft, auto);
  z-index: var(--toastContainerZIndex, 9999);
}

._toastItem {
  width: var(--toastWidth, 16rem);
  height: var(--toastHeight, auto);
  min-height: var(--toastMinHeight, 3.5rem);
  margin: var(--toastMargin, 0 0 0.5rem 0);
  padding: var(--toastPadding, 0);
  background: var(--toastBackground, rgba(66, 66, 66, 0.9));
  color: var(--toastColor, #fff);
  box-shadow: var(
    --toastBoxShadow,
    0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06)
  );
  border: var(--toastBorder, none);
  border-radius: var(--toastBorderRadius, 0.125rem);
}

._toastMsg {
  padding: var(--toastMsgPadding, 0.75rem 0.5rem);
}

._toastBtn {
  width: var(--toastBtnWidth, 2rem);
  height: var(--toastBtnHeight, 100%);
  font: var(--toastBtnFont, 1rem sans-serif);
}

._toastBtn::after {
  content: var(--toastBtnContent, '✕');
}

._toastBar {
  background: var(--toastBarBackground, rgba(33, 150, 243, 0.75));
  top: var(--toastBarTop, auto);
  right: var(--toastBarRight, auto);
  bottom: var(--toastBarBottom, 0);
  left: var(--toastBarLeft, 0);
  height: var(--toastBarHeight, 6px);
  width: var(--toastBarWidth, 100%);
}

So to apply your custom theme globally, do something like:

<style>
  :root {
    --toastBackground: #abcdef;
    --toastColor: #123456;
    --toastHeight: 300px;
    ...
  }
</style>

To apply CSS overrides to a particular Toast Item (on a per-toast basis), emit the toast with options:

toast.push('Yo!', {
  theme: {
    '--toastBackground': 'cyan',
    '--toastColor': 'black',
    ...
  }
})

where theme is an object containing one or more CSS var key/value pairs.

Create Your Own Toast Actions

For convenient composing, you can either push toasts with user-defined classes (from v0.7), or create your own common toast actions by stubbing them out. For example:

my-theme.js

import { toast } from '@zerodevx/svelte-toast'

export const success = m => toast.push(m, {
  theme: {
    '--toastBackground': 'green',
    '--toastColor': 'white',
    '--toastBarBackground': 'olive'
  }
})

export const warning = m => toast.push(m, { theme: { ... } })

export const failure = m => toast.push(m, { theme: { ... } })

Then simply import these stubs in your consuming component:

import { success, warning, failure } from './my-theme'

// Do something, then
success('It works!')

Rich HTML

Toast messages can be in rich HTML too - for example:

// Definitely not spam
toast.push(`<strong>You won the jackpot!</strong><br>
  Click <a href="#" target="_blank">here</a> for details! 😛`)

Custom Fonts and Styles

In a Svelte app, the quickest way to apply custom styles is to wrap the toast container then apply styles on the wrapper:

<style>
  .wrap {
    display: contents;
    font-family: Roboto, sans-serif;
    font-size: 0.875rem;
    /* You can set CSS vars here too */
    --toastBackground: pink;
    ...
  }
  .wrap :global(strong) {
    font-weight: 600;
  }
</style>

<div class="wrap">
  <SvelteToast />
</div>

In Vanilla JS, simply apply your styles to the ._toastContainer class:

._toastContainer {
  font-family: Roboto, sans-serif;
  --toastBackground: yellow;
  ...
}

Features

New from `v0.4`

Supporting Multiple Toast Containers

It's now easy to send toasts to different container targets within your app. For example:

<script>
  import { SvelteToast, toast } from '@zerodevx/svelte-toast'

  // Sends a toast to default toast container
  toast.push('Yo!')

  // Sends a toast to "new" toast container
  toast.push('Hey!', { target: 'new' })
</script>

<style>
  .wrap {
    --toastContainerTop: 0.5rem;
    --toastContainerRight: 2rem;
    --toastContainerBottom: auto;
    --toastContainerLeft: 2rem;
    --toastWidth: 100%;
    font-size: 0.875rem;
    ...
  }
</style>

<!-- Default toast container -->
<SvelteToast />

<!-- Another toast container -->
<div class="wrap">
  <!-- Declare container with a unique `target` name -->
  <SvelteToast target="new" options={{ duration: 8000, intro: { y: -64 } }} />
</div>

Removing Multiple Toasts (Outdated)

~~pop() now accepts a filter function.~~ This has been deprecated, but will remain for backward compatibility until the next major. The recommended way to remove all toasts from a container target has changed from v0.9.

// Remove all toasts from "new" container
toast.pop((i) => i.target !== 'new') // DEPRECATED

// Or remove ALL active toasts from ALL containers
toast.pop(0)

Accepting Object as First Param

push() and set() can also take an object as its first parameter.

let id = toast.push('Yo!', { duration: 2000 })
// ...is semantically equivalent to
id = toast.push({ msg: 'Yo!', duration: 2000 })

toast.set(id, { msg: 'Waddup!' })
// ...is semantically equivalent to
toast.set({ id, msg: 'Waddup!' })

New from `v0.5`

Pausable Toasts

Progress bar tweens can now be paused when the mouse cursor (on desktop) is hovered over the toast item. This behaviour is disabled by default. To enable, set option pausable: true.

toast.push('Hover me!', { pausable: true })

Send Svelte Component as a Message

To support complex UIs or workflows, a Svelte component can be pushed instead of a standard message if you're using this in a Svelte project. To do so, push options with component defined:

import MyCustomSvelteComponent from './MyCustomSvelteComponent.svelte'

toast.push({
  component: {
    src: MyCustomSvelteComponent, // set `src` to the component itself (required)
    props: { ... },               // pass in `props` as key/value pairs (optional)
    sendIdTo: 'toastId'           // forward toast id to `toastId` prop (optional)
  },
  ...                             // any other toast options
})

New from `v0.6`

`onpop()` Callback Function

A callback function can be run when a toast is closed. To do so, pass the function to the onpop toast option:

toast.push('Hello world', {
  onpop: (id) => {                // optionally get the toast id if needed
    console.log(`${id} removed`)
  },
  ...                             // any other toast options
})

New from `v0.7`

Styling with User-Defined Classes

Custom class names can now be passed into each toast item. Very useful for composing toast actions, or implementing CSS-only dark modes.

<script>
  toast.push('Foo', { classes: ['info'] }) // background green
  toast.push('Bar', { classes: ['warn'] }) // background red
</script>
<SvelteToast options={{ classes: ['log'] }} />
<style>
  :global(.log.info) {
    --toastBackground: green;
  }
  :global(.log.warn) {
    --toastBackground: red;
  }
</style>

New from `v0.8`

Auto-pause Toasts when Page Hidden

This feature uses the Page Visibility API (if it's supported) to pause/resume a toast whenever the browser tab visibility changes - allowing one to emit notifications in the background without it being dismissed prematurely. This now happens automatically and is default behaviour, since notifications should by nature ensure that they're seen.

Customise Dismiss Button

Additional CSS vars are exposed - specifically, --toastBtnContent allows the '✕' default character to be changed. As with CSS content keys for pseudo elements, url() can be used to load external or inline icons.

<script>
  import { toast, SvelteToast } from '@zerodevx/svelte-toast'

  const options = {
    theme: {
      '--toastBtnContent': `url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' ...")`
    }
  }
</script>

<button on:click={() => toast.push('Hello!')}>SHOW TOAST</button>

<SvelteToast {options} />

New from `v0.9`

Removing Multiple Toasts

Removing all toasts from a particular container target has just become more targeted. Simply call pop() with param { target: 'containerName' }, or call pop(0) to clear everything.

// Remove all toasts from "new" container
toast.pop({ target: 'new' })

// Or remove ALL active toasts from ALL containers
toast.pop(0)

Big Tooling Upgrade

Under the hood, the project's been migrated to svelte-package. For Svelte consumers, this helps keep in sync with breaking changes that happen in Svelte-world. For other consumers, there's a change in import path:

// For non-Svelte users, import the compiled code
import { toast, SvelteToast } from '@zerodevx/svelte-toast/dist' // ESM
const { toast, SvelteToast } = require('@zerodevx/svelte-toast/dist') // CJS

Toast Options

// Default options
const options = {
  duration: 4000,       // duration of progress bar tween to the `next` value
  initial: 1,           // initial progress bar value
  next: 0,              // next progress value
  pausable: false,      // pause progress bar tween on mouse hover
  dismissable: true,    // allow dismiss with close button
  reversed: false,      // insert new toast to bottom of stack
  intro: { x: 256 },    // toast intro fly animation settings
  theme: {},            // css var overrides
  classes: []           // user-defined classes
}

Toast Methods

/**
 * Send a new toast
 * @param {(string|SvelteToastOptions)} msg
 * @param {SvelteToastOptions} [opts]
 * @returns {number}
 */
function push(msg, opts) { ... }

/**
 * Remove toast(s)
 * @param {(number|Object<'target',string>)} [id]
 */
function pop(id) { ... }

/**
 * Update an existing toast
 * @param {(number|SvelteToastOptions)} id
 * @param {SvelteToastOptions} [opts]
 */
function set(id, opts) { ... }

Development

Packaging is through SvelteKit. Standard Github contribution workflow applies.

Tests

Testing is through Playwright. To run the tests headlessly:

$ npm run test

Changelog

Please refer to the releases page.

License

ISC