function closestParent()

in js/reveal.js [1795:1818]

• 16 lines of code
• 6 McCabe index (conditional complexity)

	function closestParent( target, selector ) {

		var parent = target.parentNode;

		while( parent ) {

			// There's some overhead doing this each time, we don't
			// want to rewrite the element prototype but should still
			// be enough to feature detect once at startup...
			var matchesMethod = parent.matches || parent.matchesSelector || parent.msMatchesSelector;

			// If we find a match, we're all set
			if( matchesMethod && matchesMethod.call( parent, selector ) ) {
				return parent;
			}

			// Keep searching
			parent = parent.parentNode;

		}

		return null;

	}