Class: ServiceWorkers

Query and receive events from a sessions active service workers.

进程：主进程

通过Session的serviceWorkers属性来访问ServiceWorkers的实例

例如：

const { session } = require('electron')
// Get all service workers.
console.log(session.defaultSession.serviceWorkers.getAllRunning())
// Handle logs and get service worker info
session.defaultSession.serviceWorkers.on('console-message', (event, messageDetails) => {
  console.log(
    'Got service worker message',
    messageDetails,
    'from',
    session.defaultSession.serviceWorkers.getFromVersionID(messageDetails.versionId)
  )
})

实例事件

The following events are available on instances of ServiceWorkers:

Event: ‘console-message’

返回:

• event Event
• messageDetails Object - Information about the console message
  • message String - The actual console message
  • versionId Number - The version ID of the service worker that sent the log message
  • source String - The type of source for this message. Can be javascript, xml, network, console-api, storage, app-cache, rendering, security, deprecation, worker, violation, intervention, recommendation or other.
  • level Number - The log level, from 0 to 3. In order it matches verbose, info, warning and error.
  • sourceUrl String - The URL the message came from
  • lineNumber Number - The line number of the source that triggered this console message

Emitted when a service worker logs something to the console.

Event: ‘registration-completed’

返回:

• event Event
• details Object - Information about the registered service worker
  • scope String - The base URL that a service worker is registered for

Emitted when a service worker has been registered. Can occur after a call to navigator.serviceWorker.register('/sw.js') successfully resolves or when a Chrome extension is loaded.

实例方法

在ServiceWorkers实例对象中，有以下方法:

serviceWorkers.getAllRunning()

Returns Record<Number, ServiceWorkerInfo> - A ServiceWorkerInfo object where the keys are the service worker version ID and the values are the information about that service worker.

serviceWorkers.getFromVersionID(versionId)

• versionId Number

Returns ServiceWorkerInfo - Information about this service worker

If the service worker does not exist or is not running this method will throw an exception.