html - How do you listen / detect changes to an input value - when the input value is changed via javascript?

Question

I've got an input with google autoComplete connected.

When the user moves up and down through the seachResultsthe value of the input is changed dynamically via JavaScript.

I'd like to capture the value that is in the input at any given time.

I've tried onChange and onInput but since no event is getting fired, and the value of the DOM Node is not getting set - there are no updates.

How do you detect changes to the input that are dynamically updated via JavaScript?

Answer 1

The .value attribute will only change if the script-writer has called setAttribute('value' to set the new value, which is quite an odd thing to do. In almost all situations, I would expect the value to be set by assigning to the value property directly, eg:

input.value = 'foo';

Calling setAttribute will indeed show a change in the inspected DOM attribute, eg:

<input value="somevalue">

const input = document.querySelector('input');
input.setAttribute('value', 'foo');
console.log(input.outerHTML);

<input>