Html5 Programming Language

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?

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

I am trying to create a custom table row but having difficulty getting it to behave properly. I… Read more Creating A Custom Table Row

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?

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) {`

I'm beginning to use custom elements, and one thing I can't figure out is sharing styling. … Read more Shared Styling With Custom Html Elements?

I don't know how to make a disqus comments code to work inside of my custom elements. Structu… Read more Disqus Comments Don't Work In A Polymer Custom Element

I do not understand why pseudo classes like :focus-within need to be within the :host() function br… Read more Why Do Pseudoclasses On The Host Element Have To Be Inside Of The Host Function?