I would like to create a custom callback function for a custom function and pass callback as a parameter.
function customFunction(a, b, callback) {
// Some code
}
customFunction("val1", "val2", function(){
//Code to execute after callback
});
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2 Answers
You're almost there...
function customFunction(a, b, callback) {
// Some code
if (typeof callback === 'function') {
callback();
}
}
customFunction("val1", "val2", function(){
//Code to execute after callback
});
4 Comments
Rahul Dagli
I'm getting "Uncaught TypeError: callback is not a function"
pistou
I'd add
if (typeof callback === 'function') { callback(); } in case you have no 3rd parameter.Rahul Dagli
Thanks, "if (typeof callback === 'function') { callback(); }" solved the issue :)
Kevin Coulson
I've added that in to the solution
The solution of Coulson is good. To show it more clearly we can add the timeout function as follow:
function customFunction(a, b, callback) {
setTimeout(function(){
console.log("original function");
callback();
},1000);
}
$(document).ready(function() {
$('#test').click(function() {
customFunction("val1", "val2",function(){
console.log("callback function");
});
});
});
Following is the link for check - https://jsfiddle.net/y0ch9exw/
