Chrome扩展程序：在页面加载前注入JS [英] Chrome extension: Inject JS before page load
问题描述
是否可以在页面加载之前注入JS，还是有必要使用内容脚本和文档完成方式？
例如，是否有更快的方式来执行JS打开页面红色打开它？
声明清单文件中的内容脚本（< head> run_at：document_start）以使其尽快运行， / code>目前还不存在）。
对于您的具体示例，最好是声明一种内容样式，类似于内容脚本，但使用css键代替js。
如果您想尽快动态运行脚本，请致电 chrome.tabs.executeScript 当 chrome.webNavigation.onCommitted 事件触发。
Is it possible to inject JS before page load, or is it necessary to use content scripts and way for the document to finish?
For example, is there a faster way to execute JS that turns the page red as soon as it's opened?
Declare a content script in the manifest file with "run_at": "document_start" to get it to run as soon as possible, i.e. right after constructing the document root (when <head> does not exist yet).
For your very specific example, it might be better to declare a content style instead, similar to content scripts, but using the "css" key instead of "js".
If you want to dynamically run a script as soon as possible, then call chrome.tabs.executeScript when the chrome.webNavigation.onCommitted event is triggered.
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