Getting Started

Installation

npm install svelte-modals

Add <ModalStack /> to your app

All opened modals will be rendered in this component. If you’re using SvelteKit, +layout.svelte would be appropriate place to put this. Otherwise, wherever you want the modals to be rendered.

App.svelte

<script>
  import { ModalStack } from 'svelte-modals'
</script>

<ModalStack>
  <!-- shown when any modal is opened -->
  {#snippet backdrop({ close })}
    <div
      class="backdrop"
      onclick={() => close()}
    />
  {/snippet}
</ModalStack>

<style>
  .backdrop {
    position: fixed;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    background: rgba(0,0,0,0.50)
  }
</style>

Create your Modal component

Svelte Modals does not provide any modal components, it is only responsible for managing what is opened and closed. All other functionality and styling is up to you.

Let’s create a basic modal component:

MyModal.svelte

<script>
  const {
    // provided by <ModalStack />
    isActive,
    close,

    // your props
    title,
    message
  } = $props()

</script>

{#if isActive}
  <div role="dialog" class="modal">
    <div class="contents">
      <h2>{title}</h2>
      <p>{message}</p>
      <div class="actions">
        <button onclick={() => close()}>OK</button>
      </div>
    </div>
  </div>
{/if}

<style>
  .modal {
    position: fixed;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    display: flex;
    justify-content: center;
    align-items: center;

    /* allow click-through to backdrop */
    pointer-events: none;
  }

  .contents {
    min-width: 240px;
    padding: 16px;
    background: white;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    pointer-events: auto;
  }

  h2 {
    text-align: center;
    font-size: 24px;
  }

  p {
    text-align: center;
    margin-top: 16px;
    border-radius: 6px;
  }

  .actions {
    margin-top: 32px;
    display: flex;
    justify-content: flex-end;
  }

</style>

Try it out

<script>
  import { modals } from 'svelte-modals'
  import MyModal from '../../components/MyModal.svelte'

  function handleClick() {
    modals.open(MyModal, { title: "Alert", message: "This is an alert" })
  }
</script>

<button onclick={handleClick}>Open Modal</button>

Open Modal