JSFiddle - React, Tailwind, and code Playground

HTML

<div class="parent">
    <input type="checkbox" name="name1" />
    <input type="checkbox" name="name2" />
    <input type="checkbox" name="name3" checked="checked" />
    <input type="checkbox" name="name4" checked="checked" />
    <input type="checkbox" name="name5" />
</div>

JavaScript

var names = $('.parent input:checked').map(function () {
    return this.name;
}).get();

console.log(names);