Both onclick and addEventListener javascript function will work but sometimes it creates problem for developers to understand what the exact difference of these two's are. var h = ...

The prevent-addEventListener scriptlet currently uses Object.defineProperty with a no-op setter (set: () => {}) by default to protect the addEventListener override from being overwritten. This causes ...

Polymer adds a null listener to the 'tap' event on document (something about enabling document-wide listeners): // enable document-wide tap recognizer if (event ...