Call JavaScript function with parameters from Qt C++

[qt_developer]

I know how can I call a JavaScript function without parameters from Qt C++ code:

JavaScript code:

function foo() {
  console.log("bar");
}

function foo() {
  console.log("bar");
}

To copy to clipboard, switch view to plain text mode 

Qt code:

QString foo = "foo(); null";
    ui->webView->page()->mainFrame()->evaluateJavaScript(foo);

QString foo = "foo(); null";
    ui->webView->page()->mainFrame()->evaluateJavaScript(foo);

To copy to clipboard, switch view to plain text mode 

I want to call a JavaScript fuction with parameters from Qt C++ code. How can I do it? It's possible to perform a pass parameters?

Best regards.

[anda_skoa]

If the parameter value can be expressed as a string, you could simple make it part of the "script"

const QString scriptWithPlaceHolders = "foo(%1);";
 
evaluateJavaScrpt(scriptWithPlaceHolders.arg(argument));

const QString scriptWithPlaceHolders = "foo(%1);";

evaluateJavaScrpt(scriptWithPlaceHolders.arg(argument));

To copy to clipboard, switch view to plain text mode 

Cheers,
_

[xeyos]

Im having some problems with this.
Ive got this code

const QString scriptWithPlaceHolders = "test();null";
    ((std::pair<QWebView*, std::string>)publicWindows.at(0)).first->page()->mainFrame()->evaluateJavaScript(scriptWithPlaceHolders);

const QString scriptWithPlaceHolders = "test();null";
    ((std::pair<QWebView*, std::string>)publicWindows.at(0)).first->page()->mainFrame()->evaluateJavaScript(scriptWithPlaceHolders);

To copy to clipboard, switch view to plain text mode 

over this javascript

function test(){
				document.getElementById("title").innerHTML = ":(";
			}

function test(){
				document.getElementById("title").innerHTML = ":(";
			}

To copy to clipboard, switch view to plain text mode 

And everything seems fine, but if i try:

const QString scriptWithPlaceHolders = "test(%1);null";
    ((std::pair<QWebView*, std::string>)publicWindows.at(0)).first->page()->mainFrame()->evaluateJavaScript(scriptWithPlaceHolders.arg(":("));

const QString scriptWithPlaceHolders = "test(%1);null";
    ((std::pair<QWebView*, std::string>)publicWindows.at(0)).first->page()->mainFrame()->evaluateJavaScript(scriptWithPlaceHolders.arg(":("));

To copy to clipboard, switch view to plain text mode 

over

function test(purq){
				document.getElementById("title").innerHTML = ":(";
			}

function test(purq){
				document.getElementById("title").innerHTML = ":(";
			}

To copy to clipboard, switch view to plain text mode 

it does not work, any idea on what can be wrong?

[wysota]

Please explain how "does not work" manifest itself.

[sulliwk06]

If I were a betting man, I would bet you need to include some escaped quotations so that your parameter gets passed as a string to your function.

[xeyos]

does not work was function not being called, but sulliwk was right it worked doing this:
evaluateJavaScript(scriptWithPlaceHolders.arg("''"));
Some wasted hours blaming everything else xD. But i really cant understand why is that even needed, more when thinking on javascript and his weak typing.
Thank you dudes.