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react-lazy-load-image-observer

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react-lazy-load-image-observer

The LazyLoadImage component allows you to lazy load images, or background-images, and set the observed element.

  • 0.0.2
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  • npm
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react-lazy-load-image-observer

The LazyLoadImage component allows you to lazy load images, or background-images, and set the observed element.

Install

yarn add react-lazy-load-image-observer

or

npm install react-lazy-load-image-observer

Import

import LazyLoadImage from 'react-lazy-load-image-observer'

About

The wrapperRef declares the element you want to observer to trigger the image loading.

Use imageRef if you want to load an image to an <img> element.

Use backgroundRef if you want to load an image to an element's background-image.

If you omit wrapperRef, the observed elem will be imageRef. You can omit backgroundRef as well.

Props

propdesc
imageSrcsrc of the image, string
classAddedname of class added to the observed element once the image has loaded, default is loaded

In order to animate, you'll have to add css in in regards to the .loaded class.

Something like

opacity: 0;
transition: opacity 400ms ease-in-out;

&.loaded {
  opacity: 1;
}

OR if using a wrapperRef, then

opacity: 0;
transition: opacity 400ms ease-in-out;

& .loaded {
  opacity: 1;
}

^^ notice the space in & .loaded, versus &.loaded

Examples

<LazyLoadImage imageSrc={src}>
  {({ wrapperRef, imageRef, backgroundRef }) => (
    <span ref={wrapperRef}>
      <img ref={imageRef} />
      <span ref={backgroundRef} />
    </span>
  )}
</LazyLoadImage>
<LazyLoadImage imageSrc={src}>{({ imageRef }) => <img ref={imageRef} />}</LazyLoadImage>
<LazyLoadImage imageSrc={src}>
  {({ backgroundRef }) => (
    <div>
      <div ref={backgroundRef} />
    </div>
  )}
</LazyLoadImage>

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Package last updated on 30 May 2019

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