interface ICoreWebView2_29

interface ICoreWebView2_29
  : public ICoreWebView2_28

A continuation of the ICoreWebView2 interface to manage dedicated workers.

Summary

Applies to

Members

add_DedicatedWorkerCreated

Adds an event handler for the DedicatedWorkerCreated event.

public HRESULT add_DedicatedWorkerCreated(ICoreWebView2DedicatedWorkerCreatedEventHandler * eventHandler, EventRegistrationToken * token)

Subscribe to this event that gets raised when a new dedicated worker is created.

A Dedicated Worker is a type of web worker that allows you to run Javascript code in the background without blocking the main thread, making them useful for tasks like heavy computations, data processing, and parallel execution. It is "dedicated" because it is linked to a single parent document and cannot be shared with other scripts.

This event is raised when a web application creates a dedicated worker using the new Worker("/worker.js") method. See the Worker for more information.

    m_appWindow->GetWebView()->QueryInterface(IID_PPV_ARGS(&m_webView2_29));
    CHECK_FEATURE_RETURN_EMPTY(m_webView2_29);

    CHECK_FAILURE(m_webView2_29->add_DedicatedWorkerCreated(
        Callback<ICoreWebView2DedicatedWorkerCreatedEventHandler>(
            [this](ICoreWebView2* sender, ICoreWebView2DedicatedWorkerCreatedEventArgs* args)
            {
                wil::com_ptr<ICoreWebView2DedicatedWorker> dedicatedWorker;
                CHECK_FAILURE(args->get_Worker(&dedicatedWorker));

                wil::unique_cotaskmem_string scriptUri;
                CHECK_FAILURE(dedicatedWorker->get_ScriptUri(&scriptUri));

                std::wstring scriptUriStr(scriptUri.get());
                m_appWindow->AsyncMessageBox(scriptUriStr, L"Dedicated worker is created");

                // Subscribe to worker destroying event
                dedicatedWorker->add_Destroying(
                    Callback<ICoreWebView2DedicatedWorkerDestroyingEventHandler>(
                        [this, scriptUriStr](
                            ICoreWebView2DedicatedWorker* sender, IUnknown* args) -> HRESULT
                        {
                            /*Cleanup on worker destruction*/
                            m_appWindow->AsyncMessageBox(
                                scriptUriStr, L"Dedicated worker is destroyed");
                            return S_OK;
                        })
                        .Get(),
                    nullptr);

                return S_OK;
            })
            .Get(),
        &m_dedicatedWorkerCreatedToken));

remove_DedicatedWorkerCreated

Removes an event handler previously added with add_DedicatedWorkerCreated.

public HRESULT remove_DedicatedWorkerCreated(EventRegistrationToken token)