(...).addListener() methods missing

[bcye]

The .addListener() methods are missing:

Examples:
chrome.pageAction.onClicked.addListener(); or
chrome.runtime.onInstalled.addListener();

Would be interested in contributing this, though I have never worked on a editor extension so I'll need to read in first.

[vaibhavhrt]

I think I am done till chrome.something.something only. Couldn't find a good way to register multi level of completion providers (https://stackoverflow.com/questions/55204709/how-to-structure-multiple-completion-providers).
You might wanna try @types/chrome which I think is better maintained.