HTML <=> Query Element Conversion

Hello! Thank you for having interest for my issue. So I am currently working on as a developer around webs. but moments like getting specific website updated, so having to fix all of my codes, is pretty time consuming. yet happens very often. to lessen such labors, Basic question start like this. I know that in some pakage like puppeteer, or Selenium and other platforms, (1) You can get the page's HTML contents indicating by Query. This is possible. (2) But what about re-tracing Query indicator from specific HTML part? For example) In this link : [login to view URL] In this page, I wanna retrace "Create an account" button's Query just by its html part. and when you acquire enitre HTML source of the page, and search string "Create an account" there appears only one result. Which means this string is only one original part in this page's entire HTML source. and when you check for this part's query. it shows as below. "#login > p > a" likewise, What I would like to get is a tool literally retracing back to get its query. so when I type in "Create an account", it automatically detect which part of the page it is, and bring me "#login > p > a" as the output. It seems quite simple but so far, I've never seen any search result or people having same interest. So please, I would be very appreciating if you could build one function which will be functioning like above :) condition 1: nodejs or AHK format. condition 2: or else, please suggest me which language format to use (which language your function is scripted) so I could check. condition 3: if this function can also operates in offline, I would like to give you 10$ more tips. ( I guess it could be done by scraping even oter parts of the page, not only scraping only html source, but also other indicators or structure) condition 4: other practical recommandation or suggestion would be welcomed. Thank you for reading! Have a good day and bid me if you think you can build one. Anytime ! And I am willing to respond very quickly to explain and describe more what I exactly need. also, if you can really make it out well this time in this project, I will promise to carry out further projects with you. Thanks alot.