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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?

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 am trying to write a method that takes in two params: one of the parentNode of the current elemen… Read more Plain Javascript Code That Does What Queryselector() And Queryselectorall() Does, Include Shadowroots

Is there an easy way to implement a typeahead using Polymer's element? The HTML tag seems to … Read more Paper-input: Suggest Values In Typeahead

I would like to be able to pass CSS width to my custom element's shadow DOM. The custom element… Read more Passing Custom Css To Polymer Element

If I understand it correctly, creating an instance of a web component can be summed up as creating … Read more Share Style Across Web Components "of The Same Type"

What is the canonical way to import styles into a web component? The following gives me an error HT… Read more Importing Styles Into A Web Component

In the new v1 web components spec, you can create a new element by saying like class gg extends HTM… Read more How To Create An Element In Javascript And Pass Parameters To It?