Hamburger.js

Install

npm install hamburger.js --save

Include CSS and JavaScript

<link href="node_modules/hamburger.js/index.css" rel="stylesheet">
<script src="node_modules/hamburger.js/index.js"></script>

Add html

No label

<button class="hamburger" data-hamburger aria-label="Menu">
    <span class="hamburger-icon"></span>
</button>

Left label

<button class="hamburger" data-hamburger>
    Menu
    <span class="hamburger-icon"></span>
</button>

Right label

<button class="hamburger" data-hamburger>
    <span class="hamburger-icon"></span>
    Menu
</button>

Initialize JavaScript

var buttons = document.querySelectorAll('[data-hamburger]');
for(var i=0; i<buttons.length; i++){
    var button = buttons[i];
    var hamburger = new Hamburger(button);
}

Using sass?

See index.scss for available options

@import "node_modules/hamburger.js/index.scss";