If the message posted from the WebView content to the host is a string
type, this method returns the value of that string. If the message
posted is some other kind of JavaScript type this method fails with the
following error.
E_INVALIDARG
Run this operation to communicate using simple strings.
For example, the following postMessage runs result in the following
WebMessageAsString values.
The D Programming Language's Unofficial Docs
beta
If the message posted from the WebView content to the host is a string type, this method returns the value of that string. If the message posted is some other kind of JavaScript type this method fails with the following error.
Run this operation to communicate using simple strings.
For example, the following postMessage runs result in the following WebMessageAsString values.
postMessage({'a': 'b'}) E_INVALIDARG postMessage(1.2) E_INVALIDARG postMessage('example') L"example"The caller must free the returned string with CoTaskMemFree. See API Conventions.