svg4everybody.js

/*! svg4everybody v1.0.0 | github.com/jonathantneal/svg4everybody */
(function (document, uses, requestAnimationFrame, CACHE, IE9TO11) {
	function embed(svg, g) {
		if (g) {
			var
			viewBox = g.getAttribute('viewBox'),
			fragment = document.createDocumentFragment(),
			clone = g.cloneNode(true);

			if (viewBox) {
				svg.setAttribute('viewBox', viewBox);
			}

			while (clone.childNodes.length) {
				fragment.appendChild(clone.childNodes[0]);
			}

			svg.appendChild(fragment);
		}
	}

	function onload() {
		var xhr = this, x = document.createElement('x'), s = xhr.s;

		x.innerHTML = xhr.responseText;

		xhr.onload = function () {
			s.splice(0).map(function (array) {
				embed(array[0], x.querySelector('#' + array[1].replace(/(\W)/g, '\\$1')));
			});
		};

		xhr.onload();
	}

	function onframe() {
		var use;

		while ((use = uses[0])) {
			var
			svg = use.parentNode,
			url = use.getAttribute('xlink:href').split('#'),
			url_root = url[0],
			url_hash = url[1];

			svg.removeChild(use);

			if (url_root.length) {
				var xhr = CACHE[url_root] = CACHE[url_root] || new XMLHttpRequest();

				if (!xhr.s) {
					xhr.s = [];

					xhr.open('GET', url_root);

					xhr.onload = onload;

					xhr.send();
				}

				xhr.s.push([svg, url_hash]);

				if (xhr.readyState === 4) {
					xhr.onload();
				}

			} else {
				embed(svg, document.getElementById(url_hash));
			}
		}

		requestAnimationFrame(onframe);
	}

	if (IE9TO11) {
		onframe();
	}
})(
	document,
	document.getElementsByTagName('use'),
	window.requestAnimationFrame || window.setTimeout,
	{},
	/Trident\/[567]\b/.test(navigator.userAgent) || (navigator.userAgent.match(/AppleWebKit\/(\d+)/) || [])[1] < 537
);