Dynamically compute list of supported properties

supported-properties.js

// Credit: https://codepen.io/leaverou/pen/eYJodjb

let style = document.body.style;
let properties = Object.getOwnPropertyNames(style.hasOwnProperty("background")? style : style.__proto__);

properties = properties.filter(p => style[p] === "") // drop functions etc
	.map(prop => { // de-camelCase
		prop = prop.replace(/[A-Z]/g, function($0) { return '-' + $0.toLowerCase() });

		if (prop.indexOf("webkit-") > -1) {
			prop = "-" + prop;
		}

		return prop;
	});


output.textContent = JSON.stringify(properties, null, "\t");