Svelte component for rendering outside the DOM of parent component

Idea borrowed from here: https://github.com/sveltejs/svelte/issues/3088#issuecomment-505785516

Installation

npm install --save svelte-portal

or

yarn add svelte-portal

Usage Portal component

The <Portal /> component has only one property: target

target can be a HTMLElement target={document.body} or a css selector target="#modals" that points to an already existing element.

When no target is given it defaults to: document.body.

Example

<script>
  import Portal from "svelte-portal";
</script>

<Portal target="body">
  <div class="toast">Entity successfully updated!</div>
</Portal>

Usage portal action

The functionality can also be applied to DOM elements directly via a svelte action:

Example

<script>
  import { portal } from "svelte-portal";
</script>

<div class="toast" use:portal={"body"} hidden>Entity successfully updated!</div>

The hidden atrribute is only needed when using ssr, when portal has moved the element to it's targetted location it removes the hidden attribute.

TypeScript support

<script lang="ts"> users should import from "svelte-portal/src/Portal.svelte" instead of "svelte-portal" to get typing support.