如何在 React-Final-Form 中使用 debounce 和 initialValue？

Question

I need to use debounce on input onChange , but I also need the value from the form's initialValues . On adding debounce with value={props.value} nothing happens in the textbox on typing which is expected as props.value get updated after the debounce timer. But what is the solution for this?

  const debounced = debounce(e => {
    input.onChange(e);
  }, 500);

  <FormControl
    value={input.value}
    onChange={e => {
      e.persist();
      debounced(e);
    }}
  />

In the above case, nothing gets typed in the input box. And if I don't pass value prop, I don't get my existing value auto-populated in the input box.

Would love to get suggestions on how to achieve this.

Thanks in advance!

Answer 1

The following should debounce the input and update the state accordingly.

 const { useState } = React; const debounce = (callback, wait) => { let timeoutId = null; return (...args) => { window.clearTimeout(timeoutId); timeoutId = window.setTimeout(() => { callback.apply(null, args); }, wait); }; } const App = () => { const [current, setCurrent] = useState(''); const handleChange = debounce(e => setCurrent(e.target.value), 500); return ( <div> <form> <input type="text" onChange={handleChange} /> <p>{current}</p> </form> </div> ); }; ReactDOM.render(<App />, document.getElementById('react'));

 <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.1/umd/react.production.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.1/umd/react-dom.production.min.js"></script> <div id="react"></div>