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react-virtualized-image-measurer
Advanced tools
$ npm install react-virtualized-image-measurer --save-dev
https://codesandbox.io/s/7y66p25qv6
Component accepts an array of items, tries to extract an image from each item using image
callback prop,
then loads the image, measures it and provides the outcome to children
render-prop.
const list = [
{
image: 'http://...',
title: 'Foo'
}
//...more
];
export default () => (
<ImageMeasurer
items={list}
image={item => item.image}
defaultHeight={100}
defaultWidth={100}
>
{({itemsWithSizes, sizes}) => (
// itemsWithSizes = [{item: listItem, size: {width: x, height: x}]
// sizes = {'src': {width: x, height: x}}
<MasonryComponent itemsWithSizes={itemsWithSizes}/>
)}
</ImageMeasurer>
);
You can return custom width and height from onError
callback prop. If nothing was returned defaultWidth
and
defaultHeight
will be used.
export default () => (
<ImageMeasurer
onError={(event, item, src) => {
console.error('Cannot load image', src, 'for item', item, 'event', event);
return {width: 100, height: 100};
}}
>...</ImageMeasurer>
);
You should not do anything extra if you simply add items to the end of original array. But if you filter items, change
their order or insert items in the middle (basically anything that affect old items positioning), you have to manually
reset Masonry
caches due to it's optimizations.
To do that you will have to save Masonry
's ref
somewhere:
const setRef = (node) => masonryRef = node;
<Masonry ref={setRef}/>
And using this ref
call following methods:
cellMeasurerCache.clearAll();
cellPositioner.reset(cellPositionerConfig);
masonryRef.clearCellPositions();
You can supply a custom key extractor callback prop in case you have duplicates in your array:
export default () => (
<ImageMeasurer
keyMapper={(item, index) => item.id}
>...</ImageMeasurer>
);
FAQs
Image Preloader for React & React Virtualized
The npm package react-virtualized-image-measurer receives a total of 366 weekly downloads. As such, react-virtualized-image-measurer popularity was classified as not popular.
We found that react-virtualized-image-measurer demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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