I have several websites, and I can't remember where I wrote some lines of code. As my pages are indexed by Google, I would like to know if Google offers a facility to search within the HTML source code/mark-up itself, instead of just allowing search within the visual, rendered, part of a page?
Thanks
There is a new search engine called NerdyData which lets you search on HTML/CSS/JS source code
They index over 160 Million public domains and I've found the data useful.