parser-constructs-custom-element-in-document-write.html (1454B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <title>Custom Elements: Changes to the HTML parser</title> 5 <meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org"> 6 <meta name="assert" content="HTML parser must construct custom elements inside document.write"> 7 <link rel="help" href="https://html.spec.whatwg.org/#create-an-element-for-the-token"> 8 <link rel="help" href="https://dom.spec.whatwg.org/#concept-create-element"> 9 <link rel="help" href="https://html.spec.whatwg.org/#document.write()"> 10 <script src="/resources/testharness.js"></script> 11 <script src="/resources/testharnessreport.js"></script> 12 </head> 13 <body> 14 <div id="log"></div> 15 <script> 16 17 var numberOfChildNodesInConnectedCallback = 0; 18 19 class MyCustomElement extends HTMLElement { 20 connectedCallback() { 21 numberOfChildNodesInConnectedCallback = this.childNodes.length; 22 } 23 } 24 customElements.define('my-custom-element', MyCustomElement); 25 26 document.write('<my-custom-element>hello <b>world</b></my-custom-element>'); 27 28 test(function () { 29 var instance = document.querySelector('my-custom-element'); 30 31 assert_true(instance instanceof HTMLElement); 32 assert_true(instance instanceof MyCustomElement); 33 34 }, 'HTML parser must instantiate custom elements inside document.write'); 35 36 test(function () { 37 assert_equals(numberOfChildNodesInConnectedCallback, 0); 38 39 }, 'HTML parser should call connectedCallback before appending child nodes inside document.write'); 40 41 </script> 42 </body> 43 </html>