content_scripts

类型	`数组`
Mandatory	No
范例	`"content_scripts": [ { "matches": ["://.mozilla.org/*"], "js": ["borderify.js"] } ]`

Instructs the browser to load content scripts into web pages whose URL matches a given pattern.

This key is an array. Each item is an object which:

must contain a key named 匹配 , which specifies the URL patterns to be matched in order for the scripts to be loaded;
may contain keys named js and css , which list scripts and/or stylesheets to be loaded into matching pages; and
may contain a number of other properties that control finer aspects of how and when content scripts are loaded.

Details of all the keys you can include are given in the table below.

名称	类型	描述
`all_frames`	`布尔`	`true` Inject the scripts specified in `js` and `css` into all frames matching the specified URL requirements, even if the frame is not the topmost frame in a tab. This does not inject into child frames where only their parent matches the URL requirements and the child frame does not match the URL requirements. The URL requirements are checked for each frame independently. 注意： This also applies to any tracker or ad that uses iframes, which means that enabling this could make your content script get called dozens of times on some pages. `false` Inject only into frames matching the URL requirements which are the topmost frame in a tab. 默认为 `false` .
`css`	`数组`	An array of paths, relative to `manifest.json` , referencing CSS files that will be injected into matching pages. Files are injected in the order given, and at the time specified by `run_at` . 注意： Firefox resolves URLs in injected CSS files relative to the CSS file itself, rather than to the page it's injected into.
`exclude_globs`	`数组`	An array of strings containing wildcards. See Matching URL patterns 下文。
`exclude_matches`	`数组`	An array of match patterns 。见 Matching URL patterns 下文。
`include_globs`	`数组`	An array of strings containing wildcards. See Matching URL patterns 下文。
`js`	`数组`	An array of paths, relative to `manifest.json` , referencing JavaScript files that will be injected into matching pages. Files are injected in the order given. This means that, for example, if you include jQuery here followed by another content script, like this... `"js": ["jquery.js", "my-content-script.js"]` ...then `"my-content-script.js"` can use jQuery. The files are injected after any files in `css` , and at the time specified by `run_at` .
`match_about_blank`	`布尔`	Insert the content scripts into pages whose URL is `"about:blank"` or `"about:srcdoc"` , if the URL of the page that opened or created this page matches the patterns specified in the rest of the `content_scripts` key. This is especially useful to run scripts in empty iframes , whose URL is `"about:blank"` . To do this you should also set the `all_frames` key. For example, suppose you have a `content_scripts` key like this: `"content_scripts": [ { "js": ["my-script.js"], "matches": ["https://example.org/"], "match_about_blank": true, "all_frames": true } ]` If the user loads `https://example.org/` , and this page embeds an empty iframe, then `"my-script.js"` 将是 loaded into the iframe. 注意： `match_about_blank` is supported in Firefox from version 52. Note that in Firefox, content scripts won't be injected into empty iframes at `"document_start"` , even if you specify that value in `run_at` .
`匹配`	`数组`	An array of match patterns 。见 Matching URL patterns 下文。 This is the only mandatory key.
`run_at`	`字符串`	This option determines when the files specified in `css` and `js` are injected. You can supply one of three strings here, each of which identifies a state in the process of loading a document. The states directly correspond to `Document.readyState` : `"document_start"` Corresponds to `loading` . The DOM is still loading. `"document_end"` Corresponds to `interactive` . The DOM has finished loading, but resources such as scripts and images may still be loading. `"document_idle"` Corresponds to `complete` . The document and all its resources have finished loading. 默认值为 `"document_idle"` . In all cases, files in `js` are injected after files in `css` .

Matching URL patterns

"content_scripts" key attaches content scripts to documents based on URL matching: if the document's URL matches the specification in the key, then the script will be attached. There are four properties inside "content_scripts" that you can use for this specification:

匹配
exclude_matches
include_globs
exclude_globs

To match one of these properties, a URL must match at least one of the items in its array. For example, given a property like:

"matches": ["*://*.example.org/*", "*://*.example.com/*"]

Both http://example.org/ and http://example.com/ will match.

由于 匹配 is the only mandatory key, the other three keys are used to limit further the URLs that match. To match the key as a whole, a URL must:

match the 匹配 property
AND match the include_globs property, if present
AND NOT match the exclude_matches property, if present
AND NOT match the exclude_globs property, if present

globs

A glob is just a string that may contain wildcards.

There are two types of wildcard, and you can combine them in the same glob:

* matches zero or more characters
? matches exactly one character.

例如： "*na?i" would match "illuminati" and "annunaki" , but not "sagnarelli" .

范例

"content_scripts": [

{


"matches"


:


[


"*://*.mozilla.org/*"


]


,


"js"


:


[


"borderify.js"


]


}


]

This injects a single content script borderify.js into all pages under mozilla.org or any of its subdomains, whether served over HTTP or HTTPS.

  "content_scripts": [
    {
      "exclude_matches": ["*://developer.mozilla.org/*"],
      "matches": ["*://*.mozilla.org/*"],
      "js": ["jquery.js", "borderify.js"]
    }
  ]

This injects two content scripts into all pages under mozilla.org or any of its subdomains except developer.mozilla.org , whether served over HTTP or HTTPS.

The content scripts see the same view of the DOM and are injected in the order they appear in the array, so borderify.js can see global variables added by jquery.js .