[Lecture 4] JavaScript

Lecture4.md

Recursion

function talksAbout(node, string) {
	if (node.nodeType == document.ELEMENT_NODE) {
		for (var i = 0; i < node.childNodes.length; i++) {
			if (talksAbout(node.childNodes[i], string))
				return true;
	}
	return false;
	} else if (node.nodeType == document.TEXT_NODE) {
		return node.nodeValue.indexOf(string) > -1;
		}
	}
console.log(talksAbout(document.body, "book"));