cambiar el valor de un input cuando cambiel el valor de otro input en html in javascript

You can achieve this by attaching an event listener to the first input field and updating the value of the second input field when the value of the first input changes. Here's an example code snippet:

<!-- HTML code -->
<input id="input1" type="text">
<input id="input2" type="text">
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index.tsx
// JavaScript code
const input1 = document.getElementById('input1');
const input2 = document.getElementById('input2');

input1.addEventListener('input', () => {
  input2.value = input1.value; // Update the value of input2 when input1 changes
});
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In the code above, we first retrieve references to the two input fields using their IDs. We then add an event listener to input1 that listens for the 'input' event (which is fired whenever the value of an input field changes). When this event is triggered, we update the value of input2 to match the value of input1.