Qt uses Qaxwidget to enable interaction with JavaScript

First open the Web page with Qaxwidget. In my other blog, there is a description: Qt 5.7.0 using Qaxwidget to display Web pages

 
document = this->ui->axWidget->querySubObject("Document");
parentWindow = document->querySubObject("parentWindow");
parentWindow->dynamicCall("execScript(QString,QString)","js code","JavaScript");

This makes it possible to invoke the JS function in the Web page.

One thing to note is that if you invoke the statement of the JS function in the Web page below the page loading statement, the error will occur because the page is not loaded. You can then use the statement:

Parentwindow->dynamiccall ("execScript (qstring,qstring)","  Window.onload=function () {Write the JS function you want to invoke}","JavaScript");

This will default to call the JS function after the page is loaded.

Qt uses Qaxwidget to enable interaction with JavaScript