JSFiddle - React, Tailwind, and code Playground

HTML

<img class="sign">
    <img class="sign">

JavaScript

$('img.sign').attr({
    src: 'http://4.bp.blogspot.com/-Pi_SzgTqSg8/TecelklSUVI/AAAAAAAAAKk/Rpcdzw4jYOY/s1600‌​/Chrome.png',
    alt: '222' 
});

console.log($('img.sign'))