Html5 Forum

I have a custom element, called x-foo. I would like to extend it, and create an x-foo-extended elem… Read more How To Extend An Existing Custom Element?

I am trying webcomponents in a sample app. Since some of the specs are not included in some browser… Read more Html Import Webcomponents Polyfill Not Working In Firefox

I'm nesting custom elements. I'd like to have my parent custom element use methods and prop… Read more How To Get A Callback When A Custom Element *and It's Children* Have Been Initialized

If I had a script like this Read more How To Access Custom Element From Within A Linked Javascript File?

I'm trying to create a polyfill of sorts using the Custom Elements API for custom elements used… Read more Cannot Access Attributes Of A Custom Element From Its Constructor

The spec says: However, note that connectedCallback can be called more than once, so any initializ… Read more Can A Custom Element's `connectedcallback` Be Called More Than Once Before `disconnectedcallback` Is Called?

That statement pasted in my question was copied from https://developer.mozilla.org/en-US/docs/Web/W… Read more How Deal "connectedcallback May Be Called Once Your Element Is No Longer Connected" Coding A Webcomponent

What is the difference between HTMLImports.whenReady and window.addEventListener('WebComponent… Read more What Is The Difference Between `HTMLImports.whenReady` And `window.addEventListener('WebComponentsReady', Function(e) {`