JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" name="collection[]" value="0">
<input type="checkbox" name="collection[]" value="1">
<input type="checkbox" name="collection[]" value="2">

JavaScript

$('input').change(function () {
    console.log($("[name='collection[]']:checked").map(function () {
        return $(this).val();
    }).get());
});