JSFiddle - React, Tailwind, and code Playground

by Alex Alex

HTML

<span id="container">
    <span id="test1">Test1</span>
    <span id="test2">Test2</span>
</span>

JavaScript

var test1 = document.getElementById('test1');
document.getElementById('container').innerHTML = 'Test content';
//Что вернет alert
//alert(test1.innerHTML);