| 类型 |
对象
|
|---|---|
| Mandatory | No |
| 范例 |
|
使用
background
key to include one or more background scripts, and optionally a background page in your extension.
Background scripts are the place to put code that needs to maintain long-term state, or perform long-term operations, independently of the lifetime of any particular web pages or browser windows.
Background scripts are loaded as soon as the extension is loaded and stay loaded until the extension is disabled or uninstalled, unless
persistent
is specified as
false
. You can use any of the WebExtension APIs in the script, as long as you have requested the necessary
permissions
.
See the "Background pages" section in Anatomy of an extension for some more details.
background
key is an object that may have one of the following two properties, both optional:
脚本
|
An
数组
of
字符串
, each of which is a path
to a JavaScript source. The path is relative to the manifest.json file
itself. These are the scripts which will be executed in the
extension's background page.
The scripts share the same
The scripts are loaded in the order they appear in the array.
If you specify a value for
注意：
If you want to fetch a script from a remote
location with the
注意：
In Firefox prior to version 50, when the
debugger is open, scripts are not always loaded in the order given
in the array. To work around this bug, you can use the
|
page
|
If you need some particular content in the page, you can define your
own page using the
page
property, which is a
字符串
representing a path, relative your manifest.json
file, to an HTML document included in your extension bundle.
If you use this property, you can not specify background scripts using
|
background
key can also contain the following optional property:
persistent
|
A
布尔
值。
|
"background": {
"scripts": ["jquery.js", "my-background.js"]
}
Load two background scripts.
"background": {
"page": "my-background.html"
}
Load a custom background page.
BCD tables only load in the browser
最后修改： , 由 MDN 贡献者