JSFiddle - React, Tailwind, and code Playground
HTML
<input type="checkbox" id="MyObject" value="123"/>
<br/>
<button onclick="test1()">test 1</button>
<button onclick="test2()">test 2</button>
JavaScript
function test1() {
var MyObject = document.getElementById('MyObject');
console.log(MyObject);
//alert(MyObject);
}
function test2() {
var MyObject = document.getElementById('MyObject');
console.log(MyObject.toString());
//alert(MyObject.checked);
}