Javascript 从 textarea 获取值并动态填写不同的输入字段

Question

I want to fetch value from a textarea dynamically while I write and fill the value in a different input field. So that the input autofill itself from the text I write in textarea.

Answer 1

Suppose the textarea id is 'myTextArea', and the input id is 'myInput'. Using an Event Listener and the onKeyUp event (or whichever event suits your needs), you could simply do:

const myTextArea = document.getElementyById('myTextArea');
const myInput = document.getElementyById('myInput');
myTextArea.addEventListener('keyup', () => myInput.value = myTextArea.value);