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<!DOCTYPE html>
<meta charset=utf-8>
<title>Node.childNodes</title>
<link rel=help href="https://dom.spec.whatwg.org/#dom-node-childnodes">
<link rel=author title="Tim Taubert" href="mailto:ttaubert@mozilla.com">
<link rel=author title="Ms2ger" href="mailto:Ms2ger@gmail.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<div style="display: none">
<ul id='test'><li>1</li><li>2</li><li>3</li><li>4</li></ul>
</div>
<script>
test(function() {
var element = document.createElement("p");
assert_equals(element.childNodes, element.childNodes);
}, "Caching of Node.childNodes");
var check_parent_node = function(node) {
assert_array_equals(node.childNodes, []);
var children = node.childNodes;
var child = document.createElement("p");
node.appendChild(child);
assert_equals(node.childNodes, children);
assert_array_equals(children, [child]);
assert_equals(children.item(0), child);
var child2 = document.createComment("comment");
node.appendChild(child2);
assert_array_equals(children, [child, child2]);
assert_equals(children.item(0), child);
assert_equals(children.item(1), child2);
assert_false(2 in children);
assert_equals(children[2], undefined);
assert_equals(children.item(2), null);
};
test(function() {
check_parent_node(document.createElement("p"));
}, "Node.childNodes on an Element.");
test(function() {
check_parent_node(document.createDocumentFragment());
}, "Node.childNodes on a DocumentFragment.");
test(function() {
check_parent_node(new Document());
}, "Node.childNodes on a Document.");
test(function() {
var node = document.createElement("div");
var kid1 = document.createElement("p");
var kid2 = document.createTextNode("hey");
var kid3 = document.createElement("span");
node.appendChild(kid1);
node.appendChild(kid2);
node.appendChild(kid3);
var list = node.childNodes;
assert_array_equals([...list], [kid1, kid2, kid3]);
var keys = list.keys();
assert_false(keys instanceof Array);
keys = [...keys];
assert_array_equals(keys, [0, 1, 2]);
var values = list.values();
assert_false(values instanceof Array);
values = [...values];
assert_array_equals(values, [kid1, kid2, kid3]);
var entries = list.entries();
assert_false(entries instanceof Array);
entries = [...entries];
assert_equals(entries.length, keys.length);
assert_equals(entries.length, values.length);
for (var i = 0; i < entries.length; ++i) {
assert_array_equals(entries[i], [keys[i], values[i]]);
}
var cur = 0;
var thisObj = {};
list.forEach(function(value, key, listObj) {
assert_equals(listObj, list);
assert_equals(this, thisObj);
assert_equals(value, values[cur]);
assert_equals(key, keys[cur]);
cur++;
}, thisObj);
assert_equals(cur, entries.length);
assert_equals(list[Symbol.iterator], Array.prototype[Symbol.iterator]);
assert_equals(list.keys, Array.prototype.keys);
if (Array.prototype.values) {
assert_equals(list.values, Array.prototype.values);
}
assert_equals(list.entries, Array.prototype.entries);
assert_equals(list.forEach, Array.prototype.forEach);
}, "Iterator behavior of Node.childNodes");
test(() => {
var node = document.getElementById("test");
var children = node.childNodes;
assert_true(children instanceof NodeList);
var li = document.createElement("li");
assert_equals(children.length, 4);
node.appendChild(li);
assert_equals(children.length, 5);
node.removeChild(li);
assert_equals(children.length, 4);
}, "Node.childNodes should be a live collection");
</script>
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