@sveltejs/svelte-scroller

    2.0.7 • Public • Published

    svelte-scroller (demo)

    A scroller component for Svelte apps.

    Installation

    yarn add @sveltejs/svelte-scroller

    Usage

    <script>
      import Scroller from "@sveltejs/svelte-scroller";
    
      let index, offset, progress;
    </script>
    
    <style>
      section {
        height: 80vh;
      }
    </style>
    
    <Scroller top="{0.2}" bottom="{0.8}" bind:index bind:offset bind:progress>
      <div slot="background">
        <p>
          This is the background content. It will stay fixed in place while the
          foreground scrolls over the top.
        </p>
    
        <p>Section {index + 1} is currently active.</p>
      </div>
    
      <div slot="foreground">
        <section>This is the first section.</section>
        <section>This is the second section.</section>
        <section>This is the third section.</section>
      </div>
    </Scroller>

    You must have one slot="background" element and one slot="foreground" element — see composing with <slot> for more info.

    Parameters

    The following parameters are available:

    parameter default description
    top 0 The vertical position that the top of the foreground must scroll past before the background becomes fixed, as a proportion of window height
    bottom 1 The inverse of top — once the bottom of the foreground passes this point, the background becomes unfixed
    threshold 0.5 Once a section crosses this point, it becomes 'active'
    query 'section' A CSS selector that describes the individual sections of your foreground
    parallax false If true, the background will scroll such that the bottom edge reaches the bottom at the same time as the foreground. This effect can be unpleasant for people with high motion sensitivity, so use it advisedly

    index, offset, progress and count

    By binding to these properties, you can track the user's behaviour:

    • index — the currently active section
    • offset — how far the section has scrolled past the threshold, as a value between 0 and 1
    • progress — how far the foreground has travelled, where 0 is the top of the foreground crossing top, and 1 is the bottom crossing bottom
    • count — the number of sections

    You can rename them with e.g. bind:index={i}.

    Configuring webpack

    If you're using webpack with svelte-loader, make sure that you add "svelte" to resolve.mainFields in your webpack config. This ensures that webpack imports the uncompiled component (src/index.html) rather than the compiled version (index.mjs) — this is more efficient.

    If you're using Rollup with rollup-plugin-svelte, this will happen automatically.

    License

    LIL

    Keywords

    Install

    npm i @sveltejs/svelte-scroller

    DownloadsWeekly Downloads

    216

    Version

    2.0.7

    License

    LIL

    Unpacked Size

    11.7 kB

    Total Files

    5

    Last publish

    Collaborators

    • dominik_g
    • rich_harris
    • svelte-admin
    • conduitry