58 lines
1.4 KiB
Markdown
58 lines
1.4 KiB
Markdown
---
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title: React useClickInside hook
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type: snippet
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tags: [hooks,effect,event]
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author: chalarangelo
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cover: digital-nomad-10
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dateModified: 2020-11-16T14:17:53+02:00
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---
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Handles the event of clicking inside the wrapped component.
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- Create a custom hook that takes a `ref` and a `callback` to handle the `'click'` event.
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- Use the `useEffect()` hook to append and clean up the `click` event.
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- Use the `useRef()` hook to create a `ref` for your click component and pass it to the `useClickInside` hook.
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```jsx
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const useClickInside = (ref, callback) => {
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const handleClick = e => {
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if (ref.current && ref.current.contains(e.target)) {
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callback();
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}
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};
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React.useEffect(() => {
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document.addEventListener('click', handleClick);
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return () => {
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document.removeEventListener('click', handleClick);
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};
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});
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};
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```
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```jsx
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const ClickBox = ({ onClickInside }) => {
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const clickRef = React.useRef();
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useClickInside(clickRef, onClickInside);
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return (
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<div
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className="click-box"
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ref={clickRef}
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style={{
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border: '2px dashed orangered',
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height: 200,
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width: 400,
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display: 'flex',
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justifyContent: 'center',
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alignItems: 'center'
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}}
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>
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<p>Click inside this element</p>
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</div>
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);
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};
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ReactDOM.createRoot(document.getElementById('root')).render(
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<ClickBox onClickInside={() => alert('click inside')} />
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);
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```
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