JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" class="icon" value="Hello world" />

CSS

input.icon {
    background: url('http://www.gravatar.com/avatar/398eb5455ff290780d6164c830e6186b?s=14') no-repeat;
    padding-left: 12px;
}

button img {
    vertical-align: middle;
    margin-right: 2px;
}

JavaScript

var btn = $('<button />', {

}).appendTo('body');

$('<img />', {
    alt: '',
    src: 'http://www.gravatar.com/avatar/398eb5455ff290780d6164c830e6186b?s=14'
}).prependTo(btn);