69 lines
1.8 KiB
Markdown
69 lines
1.8 KiB
Markdown
### MultiselectCheckbox
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Renders a checkbox list that uses a callback function to pass its selected value/values to the parent component. .
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Use `React.setState()` to create a `data` state variable and set its initial value equal to the `options` prop.
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Create a function `toggle` that is used to toggle the `checked` to update the `data` state variable and call the `onChange` callbac passed via the component's props.
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Render a `<ul>` element and use `Array.prototype.map()` to map the `data` state variable to individual `<li>` elements with `<input>` elements as their children.
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Each `<input>` element has the `type='checkbox'` attribute and is marked as `readOnly`, as its click events are handled by the parent `<li>` element's `onClick` handler.
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```jsx
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const style = {
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listContainer: {
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listStyle: 'none',
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paddingLeft: 0
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},
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itemStyle: {
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cursor: 'pointer',
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padding: 5
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}
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};
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function MultiselectCheckbox ({ options, onChange }) {
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const [data, setData] = React.useState(options);
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const toggle = (item) => {
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data.map((_, key) => {
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if (data[key].label === item.label)
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data[key].checked = !item.checked;
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});
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setData([...data]);
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onChange(data);
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}
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return (
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<ul style={style.listContainer}>
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{data.map(item => {
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return (
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<li
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key={item.label}
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style={style.itemStyle}
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onClick={() => toggle(item)}
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>
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<input readOnly type='checkbox' checked={item.checked || false} />
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{item.label}
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</li>
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);
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})}
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</ul>
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);
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}
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```
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```jsx
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const options = [{ label: "Item One" }, { label: "Item Two" }];
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ReactDOM.render(
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<MultiselectCheckbox
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options={options}
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onChange={data => {
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console.log(data);
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}}
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/>,
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document.getElementById("root")
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);
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```
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<!-- tags: input,state,array -->
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<!-- expertise: 1 -->
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