react-lazy-fastdom

    4.1.0 • Public • Published

    React Lazy Fastdom - LazyLoad Component

    React Lazy Fastdom is a fork of React Lazy Load, an easy to use React component which helps you defer loading content in predictable way.

    This fork uses fastdom to get the values of the css properties and avoid possible layout/reflow trashing.

    Also, visibility of lazy load components is calculated using window as reference by default. You can also use component inside scrolling container, such as div with scrollbar, but if you want to do that, the container element must be explicitly defined through the container prop.

    Installation

    React Lazy Load requires React 0.14 or later.

    npm install --save react-lazy-fastdom
    

    Examples

    Usage

    import React from 'react';
    import LazyLoad from 'react-lazy-fastdom';
     
    const MyComponent = () => (
      <div>
        Scroll to load images.
        <div className="filler" />
        <LazyLoad height={762} offsetVertical={300}>
          <img src='http://apod.nasa.gov/apod/image/1502/HDR_MVMQ20Feb2015ouellet1024.jpg' />
        </LazyLoad>
        <div className="filler" />
        <LazyLoad height={683} offsetTop={200}>
          <img src='http://apod.nasa.gov/apod/image/1502/2015_02_20_conj_bourque1024.jpg' />
        </LazyLoad>
        <div className="filler" />
        <LazyLoad height={480} offsetHorizontal={50}>
          <img src='http://apod.nasa.gov/apod/image/1502/MarsPlume_jaeschke_480.gif' />
        </LazyLoad>
        <div className="filler" />
        <LazyLoad
          height={720}
          onContentVisible={() => console.log('look ma I have been lazyloaded!')}
        >
          <img src='http://apod.nasa.gov/apod/image/1502/ToadSky_Lane_1080_annotated.jpg' />
        </LazyLoad>
        <div className="filler" />
      </div>
    );

    Props

    offset

    Type: Number|String Default: 0

    Aliases: threshold

    The offset option allows you to specify how far below, above, to the left, and to the right of the viewport you want to begin displaying your content. If you specify 0, your content will be displayed as soon as it is visible in the viewport, if you want to load 1000px below or above the viewport, use 1000.

    offsetVertical

    Type: Number|String Default: offset's value

    The offsetVertical option allows you to specify how far above and below the viewport you want to begin displaying your content.

    offsetHorizontal

    Type: Number|String Default: offset's value

    The offsetHorizontal option allows you to specify how far to the left and right of the viewport you want to begin displaying your content.

    offsetTop

    Type: Number|String Default: offsetVertical's value

    The offsetTop option allows you to specify how far above the viewport you want to begin displaying your content.

    offsetBottom

    Type: Number|String Default: offsetVertical's value

    The offsetBottom option allows you to specify how far below the viewport you want to begin displaying your content.

    offsetLeft

    Type: Number|String Default: offsetVertical's value

    The offsetLeft option allows you to specify how far to left of the viewport you want to begin displaying your content.

    offsetRight

    Type: Number|String Default: offsetVertical's value

    The offsetRight option allows you to specify how far to the right of the viewport you want to begin displaying your content.

    throttle

    Type: Number|String Default: 250

    The throttle is managed by an internal function that prevents performance issues from continuous firing of scroll events. Using a throttle will set a small timeout when the user scrolls and will keep throttling until the user stops. The default is 250 milliseconds.

    debounce

    Type: Boolean Default: true

    By default the throttling function is actually a debounce function so that the checking function is only triggered after a user stops scrolling. To use traditional throttling where it will only check the loadable content every throttle milliseconds, set debounce to false.

    height

    Type: String|Number

    The height option allows you to set the element's height even when it has no content.

    width

    Type: String|Number

    The width option allows you to set the element's width even when it has no content.

    onContentVisible

    Type Function

    A callback function to execute when the content appears on the screen.

    container

    Type Element|Window

    A reference to a DOM element used for calculating visibility of LazyLoad components. The default is window.

    Install

    npm i react-lazy-fastdom

    DownloadsWeekly Downloads

    1

    Version

    4.1.0

    License

    MIT

    Unpacked Size

    177 kB

    Total Files

    10

    Last publish

    Collaborators

    • davidarenas