Download react-grid-layout/test/examples/06-dynamic-add-remove.jsx from Devendra174/react-code-dataset: direct link, hf CLI and curl.
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| import React from "react"; | |
| import { WidthProvider, Responsive } from "react-grid-layout"; | |
| import _ from "lodash"; | |
| const ResponsiveReactGridLayout = WidthProvider(Responsive); | |
| /** | |
| * This layout demonstrates how to use a grid with a dynamic number of elements. | |
| */ | |
| export default class AddRemoveLayout extends React.PureComponent { | |
| static defaultProps = { | |
| className: "layout", | |
| cols: { lg: 12, md: 10, sm: 6, xs: 4, xxs: 2 }, | |
| rowHeight: 100 | |
| }; | |
| constructor(props) { | |
| super(props); | |
| this.state = { | |
| items: [0, 1, 2, 3, 4].map(function(i, key, list) { | |
| return { | |
| i: i.toString(), | |
| x: i * 2, | |
| y: 0, | |
| w: 2, | |
| h: 2, | |
| add: i === (list.length - 1) | |
| }; | |
| }), | |
| newCounter: 0 | |
| }; | |
| this.onAddItem = this.onAddItem.bind(this); | |
| this.onBreakpointChange = this.onBreakpointChange.bind(this); | |
| } | |
| createElement(el) { | |
| const removeStyle = { | |
| position: "absolute", | |
| right: "2px", | |
| top: 0, | |
| cursor: "pointer" | |
| }; | |
| const i = el.add ? "+" : el.i; | |
| return ( | |
| <div key={i} data-grid={el}> | |
| {el.add ? ( | |
| <span | |
| className="add text" | |
| onClick={this.onAddItem} | |
| title="You can add an item by clicking here, too." | |
| > | |
| Add + | |
| </span> | |
| ) : ( | |
| <span className="text">{i}</span> | |
| )} | |
| <span | |
| className="remove" | |
| style={removeStyle} | |
| onClick={this.onRemoveItem.bind(this, i)} | |
| > | |
| x | |
| </span> | |
| </div> | |
| ); | |
| } | |
| onAddItem() { | |
| /*eslint no-console: 0*/ | |
| console.log("adding", "n" + this.state.newCounter); | |
| this.setState({ | |
| // Add a new item. It must have a unique key! | |
| items: this.state.items.concat({ | |
| i: "n" + this.state.newCounter, | |
| x: (this.state.items.length * 2) % (this.state.cols || 12), | |
| y: Infinity, // puts it at the bottom | |
| w: 2, | |
| h: 2 | |
| }), | |
| // Increment the counter to ensure key is always unique. | |
| newCounter: this.state.newCounter + 1 | |
| }); | |
| } | |
| // We're using the cols coming back from this to calculate where to add new items. | |
| onBreakpointChange(breakpoint, cols) { | |
| this.setState({ | |
| breakpoint: breakpoint, | |
| cols: cols | |
| }); | |
| } | |
| onLayoutChange(layout) { | |
| this.props.onLayoutChange(layout); | |
| this.setState({ layout: layout }); | |
| } | |
| onRemoveItem(i) { | |
| console.log("removing", i); | |
| this.setState({ items: _.reject(this.state.items, { i: i }) }); | |
| } | |
| render() { | |
| return ( | |
| <div> | |
| <button onClick={this.onAddItem}>Add Item</button> | |
| <ResponsiveReactGridLayout | |
| onLayoutChange={this.onLayoutChange} | |
| onBreakpointChange={this.onBreakpointChange} | |
| {...this.props} | |
| > | |
| {_.map(this.state.items, el => this.createElement(el))} | |
| </ResponsiveReactGridLayout> | |
| </div> | |
| ); | |
| } | |
| } | |
| if (process.env.STATIC_EXAMPLES === true) { | |
| import("../test-hook.jsx").then(fn => fn.default(AddRemoveLayout)); | |
| } | |