javascript - How to call loading function with React useEffect only once
Автор: Code Samples
Загружено: 2023-06-19
Просмотров: 322
Описание:
#short
#javascript
#reactjs
#react-hooks
#use-effect
The useEffect React hook will run the passed-in function on every change. This can be optimized to let it call only when the desired properties change.
What if I want to call an initialization function from componentDidMount and not call it again on changes? Let's say I want to load an entity, but the loading function doesn't need any data from the component. How can we make this using the useEffect hook?
class MyComponent extends React.PureComponent {
componentDidMount() {
loadDataOnlyOnce();
}
render() { ... }
}
With hooks this could look like this:
function MyComponent() {
useEffect(() = {
loadDataOnlyOnce(); // this will fire on every change :(
}, [...???]);
return (...);
}
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