JSFiddle - React, Tailwind, and code Playground

by jfriend00

HTML

<input type="checkbox" name="selectAll" id="selectAll" onClick="toggle(this)" />Select All Categories

<input type="checkbox" name="category" id="category1" />category1
<input type="checkbox" name="category" id="category2" />category2
<input type="checkbox" name="category" id="category3" />category3

JavaScript

function toggle(source) {
    var checkboxes = document.getElementsByName('category');
    for (var i = 0; i < checkboxes.length; i++)
        checkboxes[i].checked = source.checked;
}