This reference is no longer being maintained. For the latest API reference, see WebView2 API Reference.
interface ICoreWebView2Frame : public IUnknown
WebView2Frame provides direct access to the iframes information.
|add_Destroyed||The Destroyed event is raised when the iframe corresponding to this CoreWebView2Frame object is removed or the document containing that iframe is destroyed.|
|add_NameChanged||Raised when the iframe changes its window.name property.|
|AddHostObjectToScriptWithOrigins||Add the provided host object to script running in the iframe with the specified name for the list of the specified origins.|
|get_Name||The name of the iframe from the iframe html tag declaring it.|
|IsDestroyed||Check whether a frame is destroyed.|
|remove_Destroyed||Remove an event handler previously added with add_Destroyed.|
|remove_NameChanged||Remove an event handler previously added with add_NameChanged.|
|WebView2 Win32 Prerelease||1.0.902|
The Destroyed event is raised when the iframe corresponding to this CoreWebView2Frame object is removed or the document containing that iframe is destroyed.
Raised when the iframe changes its window.name property.
Add the provided host object to script running in the iframe with the specified name for the list of the specified origins.
public HRESULT AddHostObjectToScriptWithOrigins(LPCWSTR name, VARIANT * object, UINT32 originsCount, LPCWSTR * origins)
The host object will be accessible for this iframe only if the iframe's origin during access matches one of the origins which are passed. The provided origins will be normalized before comparing to the origin of the document. So the scheme name is made lower case, the host will be punycode decoded as appropriate, default port values will be removed, and so on. This means the origin's host may be punycode encoded or not and will match regardless. If list contains malformed origin the call will fail. The method can be called multiple times in a row without calling RemoveHostObjectFromScript for the same object name. It will replace the previous object with the new object and new list of origins. List of origins will be treated as following:
empty list - call will succeed and object will be added for the iframe but it will not be exposed to any origin;
list with origins - during access to host object from iframe the origin will be checked that it belongs to this list;
list with "*" element - host object will be available for iframe for all origins. We suggest not to use this feature without understanding security implications of giving access to host object from from iframes with unknown origins. Calling this method fails if it is called after the iframe is destroyed.
wil::unique_variant remoteObjectAsVariant; // It will throw if m_hostObject fails the QI, but because it is our object // it should always succeed. m_hostObject.query_to<IDispatch>(&remoteObjectAsVariant.pdispVal); remoteObjectAsVariant.vt = VT_DISPATCH; // Create list of origins which will be checked. // iframe will have access to host object only if its origin belongs // to this list. LPCWSTR origin = L"https://appassets.example/"; CHECK_FAILURE(webviewFrame->AddHostObjectToScriptWithOrigins( L"sample", &remoteObjectAsVariant, 1, &origin));
For more information about host objects navigate to ICoreWebView2::AddHostObjectToScript.
The name of the iframe from the iframe html tag declaring it.
public HRESULT get_Name(LPWSTR * name)
You can access this property even if the iframe is destroyed.
Check whether a frame is destroyed.
public HRESULT IsDestroyed(BOOL * destroyed)
Returns true during the Destroyed event.
Remove an event handler previously added with add_Destroyed.
public HRESULT remove_Destroyed(EventRegistrationToken token)
Remove an event handler previously added with add_NameChanged.
public HRESULT remove_NameChanged(EventRegistrationToken token)
public HRESULT RemoveHostObjectFromScript(LPCWSTR name)