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How to call a JavaScript function from C++?
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);";
}
// codeHTML
<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>
Updated on: 10-Feb-2020
726 Views
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