jQuery callback from another function

Question

I have a function that looks like this. It works.

Problem

This function myFunction is called by many other functions and depending on which one it should do something different on success.

Question

How is this solved? Some kind of callback? or do I have to send an extra parameter for the function to know?

Code

function myfunction()
{
    var value = "myvalue";
    var post_url = "ajax.php";

    $.post(  
        post_url,
        {
             value: value,
        },
            function(responseText){  
                var json = JSON.parse(responseText);
                if(json.success)
                {
                    console.log('success'); 
                }
            }
        );
    }
}

Ulises · Accepted Answer · 2013-01-17 17:49:12Z

2

Add a function parameter and call it on success:

function myfunction(callback)
{
    var value = "myvalue";
    var post_url = "ajax.php";

    $.post(  
        post_url,
        {
             value: value,
        },
            function(responseText){  
                var json = JSON.parse(responseText);
                if(json.success)
                {
                    console.log('success'); 
                    //call callback 
                    callback();

                }
            }
        );
    }
}

answered Jan 17, 2013 at 17:49

Ulises

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Comments

Andrew Whitaker · Accepted Answer · 2013-01-17 17:47:12Z

1

Have myfunction accept a callback:

function myfunction(callback)
{
    var value = "myvalue";
    var post_url = "ajax.php";

    $.post(post_url, { value: value }, callback);
}

And then you can pass in any function to be executed when the POST comes back:

myfunction(function(responseText){  
    var json = JSON.parse(responseText);
    if (json.success)
    {
        console.log('success'); 
    }
});

answered Jan 17, 2013 at 17:47

Andrew Whitaker

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Comments

ATOzTOA · Accepted Answer · 2013-01-17 17:49:35Z

0

Yes, you will either need to have a parameter to identify the caller, like

function myfunction(caller) {
    if (caller == "Foo") {
        // some code
    }
}

myFunction("Foo");

Or use a global variable

function myFunction() {
    if (caller == "Foo") {
        // some code
    }
}

caller = "Foo";
myFunction();

answered Jan 17, 2013 at 17:49

ATOzTOA

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