How to call a JavaScript function from C++?

Javascript C++Web Development Front End Technology Programming

To call a JavaScript function from C++, generate a js file, which calls the function. The web page will load the JS and the function runs −

int callId = 0;
void callFunction() {
   // the js file
   ofstream fout("generate.js");
   fout << "caller(" << callId ++ << ", display);";
}
// code

HTML

<html>
   <body>
      <script>
         var callId = 0;
         function caller(i, func) {
            if (callId < i ) {
               callId = i;
               func();
            }
         }    
         function display() {
            alert("my Function called");
         }
         // load js script
         function loadScript(file) {
            var myId = "gh";
            var e = document.getElementById(myId);
            if ( e != null )
            e.parentNode.removeChild(e);
            var script = document.createElement("script");
            script.myId = myId;
            script.src = file;
            document.body.appendChild(script);
         }
         window.setInterval(function() {
            //path to the js file
            loadScript("file:///path/generate.js");
         }, 2000);
      </script>
   </body>
</html>

Vanithasree

Published on 30-Jan-2018 12:03:32

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