Question

Help me please! 🙁

How can I return the string by just using getValue()? I don’t know how to apply the variable into the parent function. I’m getting headache:

<script>
    function getValue() {
        new Request.JSON({
            data: JSON.encode({
                "serviceName": "demoTest",
                "methodName": "someValue",
                "parameters": []
            }),
            onSuccess: function(data) { // data = a string with some text
                var string = data;
                console.log(string); // returns the string as expected
            },
            url: "gateway/?contentType=application/json"
        }).send();

        return string; // returns undefined
    }
</script>

Answer 1

The problem here is that the return is fired long before the onSuccess (callback) function is triggered. One approach would be to use also a callback function. The way you want to do it won’t work.

Here is your getValue function:

function setValue(callback) {
    new Request.JSON({
     ...
        onSuccess: function(data) {
            callback(data);
        },
    ....
}

Here is a callback function:

var myCallback = function(data) {
    $("id").set("html", "<p>" + data + "</p>");
}

And finally call the function on document loaded:

setValue(myCallback);