Passing anonymous function as callback in Javascript - Stack Overflow

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Is there a way to pass anonymous function as a custom callback function in Javascript? I have this code:

function notifyme(msg){
    console.log(msg)
}

notifyme("msg", function(){
    //do some custom redirect logic    
});

I am trying the above code and it's executing notifyme function, but not going further with redirect code. I know I can pass a function name as a callback, but I don't have a specific function that I can pass. This is why they invented the anonymous function I guess.

It'd be really nice if there was a way to do that.

Is there a way to pass anonymous function as a custom callback function in Javascript? I have this code:

function notifyme(msg){
    console.log(msg)
}

notifyme("msg", function(){
    //do some custom redirect logic    
});

I am trying the above code and it's executing notifyme function, but not going further with redirect code. I know I can pass a function name as a callback, but I don't have a specific function that I can pass. This is why they invented the anonymous function I guess.

It'd be really nice if there was a way to do that.

• javascript
• callback
• anonymous-function

Share Improve this question Follow edited Feb 13, 2017 at 12:03 Lamar asked Feb 13, 2017 at 12:01 LamarLamar 1,83955 gold badges2828 silver badges5252 bronze badges 2

• Possible duplicate of JavaScript Style : optional callbacks – evolutionxbox Commented Feb 13, 2017 at 12:27
• The question is not about optional callback, it's about passing anonymous function call back – Lamar Commented Feb 13, 2017 at 12:45

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3 Answers 3

Sorted by: Reset to default 19

Your code pattern should be like

function notifyme(msg,callback){
    console.log(msg);
    // Do your stuff here
    if(callback){
      callback();
    }
}

notifyme("msg", function(){
    //do some custom redirect logic    
});

You can call your function simply by invoking it ():

function notifyme(msg, myFunc){
        console.log(msg);
        myFunc();
}
    
notifyme("msg", () => {
        console.log("function called");   
});

myFunc in the above is a variable pointing at your function. By invoking it, () you call the function that the variable (myFunc) points at.

This answer doesn't go into details about the custom redirect logic. Because I don't know what this does.

You need to call your callback!

function notifyme(msg, callback){
    console.log(msg);
    callback();
}

notifyme("msg", function(){
//do some custom redirect logic    
});

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