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react-variable-height-infinite-scroller
Advanced tools
variable row height scroller that renders just the visible rows with no precomputation of row-height necessary
An infinite scroller especially made for variable row heights (no precomputation of row height necessary).
See a Demo
Because sometimes you don't know the size of the rows you're going to render before rendering
npm i --save react-variable-height-infinite-scroller
<InfiniteScroller
averageElementHeight={100} // this is a guess you make!
containerHeight={600}
rowToJumpTo={rowToJumpTo} // (optional) set this if you want to start/jump to a a particular row. Must be passed as a new object each time to allow for difference checking
renderRow={renderRow} // function to render a row
totalNumberOfRows={fakeRows.length} // an array of data for your rows
/>
Name | Default | Description |
---|---|---|
containerHeight number | required | Maximum height of the scroll container |
totalNumberOfRows number | required | Length of the data array |
renderRow function | required | Function to render a row |
averageElementHeight number | (optional) 100 | This is a guess you make of what the average row height will be height. This is used to approximate how far to move the scrollbar |
rowToJumpTo | (optional) 0 | Object of shape { row: Number } . Row you want to start with or jump to. Must be passed as a new object each time to allow for difference checking |
jumpToBottomOfRow boolean | (optional) false | By default jumping to a row jumps to the top. Set to true if you want to jump to the bottom of the row |
containerClassName string | (optional) infiniteContainer | className to apply on container |
onScroll function | (optional) no-op | Hook to call on scroll |
Name | Description |
---|---|
scrollTo | Alternate way to jump to a particular row. Usage below. |
class MyComponent extends Component {
scrollSomewhere() {
this.list.scrollTo(Math.floor(Math.random() * 100));
}
render() {
return (
<div>
Here is my list:
<InfiniteScroller length={100} itemRenderer={...} ref={c => this.list = c} />
<button onClick={::this.scrollSomewhere}>Scroll Somewhere</button>
</div>
);
}
}
Taken from the demo code:
import React from 'react';
import InfiniteScroller from './InfiniteScroller.js';
function getFakeRowsWithHeights(numberOfRows) {
let newFakeRows = [];
for (let i = 0; i < numberOfRows; i++) {
newFakeRows.push({height: Math.floor(1000 * Math.random())});
}
return newFakeRows;
}
const Example1 = React.createClass({
getNewRandomRow(totalRows) {
return {row: Math.floor(totalRows * Math.random())};
},
getInitialState() {
const newNumberOfRowsToDisplay = Math.floor(Math.random() * 200);
const newFakeRows = getFakeRowsWithHeights(newNumberOfRowsToDisplay);
return {
rowToJumpTo: null,
newRowToJumpTo: this.getNewRandomRow(newFakeRows.length),
fakeRows: newFakeRows,
};
},
render() {
const newNumberOfRowsToDisplay = Math.floor(Math.random() * 200);
return (
<div style={{width: 300}} overflow="scroll">
<h3>
Example 1: Random number of rows and row heights
</h3>
<button onClick={() => {
this.setState({
rowToJumpTo: this.state.newRowToJumpTo,
newRowToJumpTo: this.getNewRandomRow(this.state.fakeRows.length),
});
}}>
Jump to a random row: Row #{this.state.newRowToJumpTo.row} (its height is {this.state.fakeRows[this.state.newRowToJumpTo.row].height})
</button>
<button onClick={() => {
const newFakeRows = getFakeRowsWithHeights(newNumberOfRowsToDisplay);
this.setState({
fakeRows: newFakeRows,
newRowToJumpTo: this.getNewRandomRow(newFakeRows.length),
});
}}>
Create {newNumberOfRowsToDisplay} new rows
</button>
<InfiniteScroller
averageElementHeight={100} // this is a guess you make!
containerHeight={600}
rowToJumpTo={this.state.rowToJumpTo} // (optional) set this if you want to start/jump to a a particular row. Must be passed as a new object each time to allow for difference checking
renderRow={this.renderRow} // function to render a row
totalNumberOfRows={this.state.fakeRows.length} // an array of data for your rows
/>
</div>
);
},
renderRow(rowNumber) {
const heightOfRow = this.state.fakeRows[rowNumber].height;
return (
<div
key={rowNumber}
style={{height: heightOfRow, background: rowNumber % 2 === 0 ? 'red' : 'orange'}}
>
Height: {heightOfRow}
<br/>
Row Number: {rowNumber}
</div>
);
},
});
React.render(<Example1 />, document.getElementById('container'));
Changelog is now autogenerated. So commits have to be prefixed by one the four following prefixes to get added to the changelog:
[added]
added a new feature[changed]
changed an existing feature[fixed]
fixed a bug[removed]
removed something or a fileRun npm test
to lint
#Changelog: Changelog
*(taken from "react-list")
FAQs
variable row height scroller that renders just the visible rows with no precomputation of row-height necessary
The npm package react-variable-height-infinite-scroller receives a total of 23 weekly downloads. As such, react-variable-height-infinite-scroller popularity was classified as not popular.
We found that react-variable-height-infinite-scroller 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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