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{"view":"split","fontsize":"100","seethrough":"","prefixfree":"1","page":"css"}

function $$(selector, context) {
	context = context || document;
	var elements = context.querySelectorAll(selector);
	return Array.prototype.slice.call(elements);
}

$$('.circular').forEach(function(el) {
	var NS = "http://www.w3.org/2000/svg";
	
	var svg = document.createElementNS(NS, "svg");
	svg.setAttribute("viewBox", "0 0 100 100");
	
	var circle = document.createElementNS(NS, "path");
	circle.setAttribute("d", "M0,50 a50,50 0 1,1 0,1z");
	circle.setAttribute("id", "circle");
	
	var text = document.createElementNS(NS, "text");
	var textPath = document.createElementNS(NS, "textPath");
	textPath.setAttributeNS("http://www.w3.org/1999/xlink", 'xlink:href', '#circle');
	textPath.textContent = el.textContent;
	text.appendChild(textPath);
	
	svg.appendChild(circle);
	svg.appendChild(text);
	
	el.textContent = '';
	el.appendChild(svg);
});

<div class="circular">
	circular reasoning works because
</div>

/**
 * Text on a circle
 */

body {
	font: bold 120% Helvetica, sans-serif;
}

.circular {
	width: 30em;
	height: 30em;
	margin: 4em auto 0;
}

.circular svg {
	display: block;
	overflow: visible;
	transition: 10s linear transform;
}

.circular svg:hover { transform: rotate(-2turn); }

.circular text { fill: currentColor }
.circular path { fill: none; }