@webcomponents/custom-elements
Version:
HTML Custom Elements Polyfill
92 lines (71 loc) • 2.5 kB
HTML
<html>
<head>
<title>Element#attachShadow</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>
</head>
<body>
<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++;
}
});
}
suite('Elements inside ShadowRoots have their callbacks called.', function() {
let element;
setup(function() {
let localName = generateLocalName();
defineWithLocalName(localName);
element = document.createElement(localName);
});
const hasAttachShadow = document.createElement('div').attachShadow instanceof Function;
const testFn = hasAttachShadow ? test : test.skip;
testFn('Open ShadowRoots', function() {
const div = document.createElement('div');
div.attachShadow({mode: 'open'});
div.shadowRoot.appendChild(element);
assert.equal(element.connectedCallbackCount, 0);
assert.equal(element.disconnectedCallbackCount, 0);
document.body.appendChild(div);
assert.equal(element.connectedCallbackCount, 1);
assert.equal(element.disconnectedCallbackCount, 0);
document.body.removeChild(div);
assert.equal(element.connectedCallbackCount, 1);
assert.equal(element.disconnectedCallbackCount, 1);
});
testFn('Closed ShadowRoots', function() {
const div = document.createElement('div');
const shadowRoot = div.attachShadow({mode: 'closed'});
shadowRoot.appendChild(element);
assert.equal(element.connectedCallbackCount, 0);
assert.equal(element.disconnectedCallbackCount, 0);
document.body.appendChild(div);
assert.equal(element.connectedCallbackCount, 1);
assert.equal(element.disconnectedCallbackCount, 0);
document.body.removeChild(div);
assert.equal(element.connectedCallbackCount, 1);
assert.equal(element.disconnectedCallbackCount, 1);
});
});
</script>
</body>
</html>