javascript - Fill in a form on a site with information that was saved beforehand? -


so i'm working on extension google chrome friend. wants fill out shipping information when checkout page loaded information filled out in form beforehand. i've set form, , saved information chrome.storage api. can track url on tab api. thing can't figure out how access input fields of page since isn't code. can inspect element , see id's, since page isn't linked javascript, don't know how strings in there. i've seen done, , site too, can't find how it. can nudge me in right direction?

a nudge, say.

first, take @ architecture overview.

that give hint need content scripts interact pages.

then may realize don't need track tabs tabs api - setting content script rule in manifest enough.

that should enough nudge.


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