Javascript change event on input element fires on only losing focus

Question

I have an input element and I want to keep checking the length of the contents and whenever the length becomes equal to a particular size, I want to enable the submit button

Answer 1

It took me 30 minutes to find it, but this is working in June 2019.

<input type="text" id="myInput" oninput="myFunction()">

and if you want to add an event listener programmatically in js

inputElement.addEventListener("input", event => {})