JSFiddle - React, Tailwind, and code Playground

by arcm111

HTML

<div id="div">1</div>
<div class="div">2</div>
<div>3</div>

JavaScript

var elm = function (str) {
    var result;
    switch (str.charAt(0)) {
        case '.': result = document.querySelectorAll(str); break;
        case '#': result = document.getElementById(str.substr(1)); break;
        default : result = document.getElementsByTagName(str); break;
    }
    return result;
}

console.log(elm('div')[0].innerHTML);