Call JavaScript function with parameters from Qt C++

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

JavaScript code:

Code:

---

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

---

Qt code:

Code:

---

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

---

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.

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

Code:

---

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

---

Cheers,
_

Im having some problems with this.
Ive got this code

Code:

---

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

---

over this javascript

Code:

---

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

---

And everything seems fine, but if i try:

Code:

---

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

---

over

Code:

---

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

---

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

Please explain how "does not work" manifest itself.

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.

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.