Tutorial by Examples

Content scripts can be declared in manifest.json to be always injected into pages that match a set of URL patterns. Minimal example "content_scripts" : [ { "js": ["content.js"], "css": ["content.css"] "matches": [&quot...

If, instead of always having a content script injected based on the URL, you want to directly control when a content script is injected, you can use Programmatic Injection. Minimal example JavaScript chrome.tabs.executeScript({file: "content.js"}); CSS chrome.tabs.insert...

Same conditions, multiple scripts If you need to inject multiple files with all other conditions being the same, for example to include a library, you can list all of them in the "js" array: "content_scripts" : [ { "js": ["library.js", "conten...