Method init

test/browser/setup/workerConsole.ts:68–105

(page: Page)

  }

  public async init(page: Page): Promise<void> {
    // Ensure the worker is activated before establishing the listener.
    await page.evaluate(() => {
      if (navigator.serviceWorker.controller) {
        // Only await the worker if it actually exists.
        // This prevents the WorkerConsole from throwing
        // when initialized in the scenarios where MSW is
        // expected to fail/skip registration. Respectively,
        // no console message forwarding will be established.
        return navigator.serviceWorker.ready
      }
    })

    await page.exposeFunction(
      'handleIncomingWorkerConsoleMessage',
      (messageType: WorkerConsoleMessageType, args: Array<string>) => {
        const [template, ...positionals] = args
        const formattedMessage = format(template, ...positionals)

        this.addMessage(messageType, formattedMessage)
        this.emit(messageType, formattedMessage)
      },
    )

    await page.evaluate(() => {
      navigator.serviceWorker.addEventListener(
        'message',
        (event: MessageEvent<InternalWorkerConsoleMessageData>) => {
          const { data } = event

          if (data.type === 'internal/console') {
            const { messageType, args } = data.payload
            window.handleIncomingWorkerConsoleMessage(messageType, args)
          }
        },
      )
    })
  }

  public removeAllListeners(...args: Array<any>) {
    this.messages.clear()