Dash Find in Page 🔎
To build upon my earlier post, Integrate Alfred and Dash: Dash supports find-in-page search via a whitespace. To search on a docs page, add a space after the function or keyword name, and then enter your search query.
Here's a command you could run to find JavaScript's Array.prototype.unshift() and search on that docs page for the 'specification' header, where the associated ECMAScript standards for unshift are found.
unshift specification
This command from Alfred could look like:
dash unshift specification