@webcomponents/custom-elements
Version:
HTML Custom Elements Polyfill
78 lines (63 loc) • 2.26 kB
HTML
<html>
<head>
<title>Node#cloneNode</title>
<script>
(window.customElements = window.customElements || {}).forcePolyfill = true;
</script>
<script src="../../../../es6-promise/dist/es6-promise.auto.min.js"></script>
<script src="../../../../web-component-tester/browser.js"></script>
<script src="../../../custom-elements.min.js"></script>
<script>
function generateLocalName() {
return 'test-element-' + Math.random().toString(32).substring(2);
}
function defineWithLocalName(localName) {
customElements.define(localName, class extends HTMLElement {
constructor() {
super();
this.constructed = true;
this.connectedCallbackCount = 0;
this.disconnectedCallbackCount = 0;
}
connectedCallback() {
this.connectedCallbackCount++;
}
disconnectedCallback() {
this.disconnectedCallbackCount++;
}
});
}
test('Cloning a customized element upgrades the cloned tree. (shallow)',
function() {
const localName = generateLocalName();
defineWithLocalName(localName);
const element = document.createElement(localName);
document.body.appendChild(element);
const clone = element.cloneNode();
assert(clone.constructed);
assert.equal(clone.connectedCallbackCount, 0);
assert.equal(clone.disconnectedCallbackCount, 0);
assert.equal(clone.childNodes.length, 0);
});
test('Cloning a customized element upgrades the cloned tree. (deep)',
function() {
const localName = generateLocalName();
defineWithLocalName(localName);
const element = document.createElement(localName);
element.appendChild(document.createElement(localName));
document.body.appendChild(element);
const clone = element.cloneNode(true);
assert(clone.constructed);
assert.equal(clone.connectedCallbackCount, 0);
assert.equal(clone.disconnectedCallbackCount, 0);
assert.equal(clone.childNodes.length, 1);
const cloneChild = clone.childNodes[0];
assert(cloneChild.constructed);
assert.equal(cloneChild.connectedCallbackCount, 0);
assert.equal(cloneChild.disconnectedCallbackCount, 0);
});
</script>
</head>
<body></body>
</html>