Can a 3D Minecraft implementation be done entirely in CSS and HTML, without a single line of JavaScript in sight? The answer ...

Hidden HTML Buttons. ... developers can use CSS code. With this method, a developer can include either an HTML button element or an input element with "type" set to either "button" or "submit." ...

jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS code right inside your browser.