How to track a javascript function?

How to track a javascript function?

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How to track a javascript function?
Tag : javascript , By : Saurabh
Date : December 05 2020, 12:22 PM

around this issue
You can use F12 developer tools to view all the function calls that occur in response to a mouse click.

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Have a javascript function privately track it's number of calls

Tag : javascript , By : omaidog
Date : March 29 2020, 07:55 AM
will be helpful for those in need I'm trying to figure out how I can have a javascript function privately track the number of times it has been called. The objective is to be able to query this value in the console during debugging by doing func.run , Closures are the way to go here:
var asdf = (function () {
    var runs = 0;
    var f = function () {
        // your function here
    f.runs = function () {
        return runs;
    return f;
asdf.runs(); // 2
asdf.runs(); // 3

Use Javascript to keep track of a function unique to each div

Tag : php , By : msugar
Date : March 29 2020, 07:55 AM
it helps some times I'd just add them to an array inside a click handler (using jQuery, but if you don't like jQuery I can rewrite it without):
var clickedColors = []
$('div').click(function() {

How to track down the function that cause javascript error and save to log

Tag : javascript , By : Comfly
Date : March 29 2020, 07:55 AM
may help you . You can wrap your functions in try/catch statements and if an error occurs you can catch errors and then write them in file via server for example.
try {
} catch (err) {
   var message = 'yourFunctionCallHere failed: ' + err.message;
   //now you can do smth with this error message, for example send an ajax request to the server...

Keep track of function calls in JavaScript

Tag : javascript , By : user150744
Date : March 29 2020, 07:55 AM
help you fix your problem If you're looking to run some kind of analysis on your code, consider using an external tool/library rather than hard-code it into your application.
Esprisma's function instrumentation example shows the possibility to inject instrumentation at runtime to keep track of function calls and such.
// define some function we can use to call functions with that will save
// previous execution parameters so we can repeat previous calls
callFunction = (function() {
    var called = {};

    function callFunction() {
        // turn the arguments associative array into a real array
        args = Array.prototype.slice(arguments, 0);

        if(args.length == 4) {
            // assume we want to call and save the function
            runAndSaveFunction.apply(this, args);
        if(args.length == 1) {
            // assume we want to recall a function based off an id
            repeatCall.apply(this, args);

    function runAndSaveFunction(context, func, args, id) {
        // call the function given a context
        func.apply(context, args);

        // save the call
        called[id] = {
            fn: func,
            args: args,
            ctx: context

    function repeatCall(id) {
        var call = called[id];
        runAndSaveFunction(call.ctx, call.fn, call.args, id);

    return callFunction;
// this function exists just to call our real function
// below with our instrumentation
function func1() {
    callFunction(this, _func1, arguments, 'someId');

// we designate the original as a "private" function that
// actually contains the implementation
function _func1(param1, param2, ... , paramN) {

func1(a, b, c, d, e...);
callFunction('someId'); // recall the previous func1 call

How to track callback function events in JavaScript?

Tag : javascript , By : Tom Smith
Date : March 29 2020, 07:55 AM
Hope this helps Due to the lack of answers about using simplified custom event listener functions, I ended up going back to using a addEventListener polyfill.
To make sure recent browsers don't load this script for no reasons, I'm conditionally loading it while still in with this simplified conditional loader:
// Event listener methods for IE8.
if (!Element.prototype.addEventListener && !document.body) {
     document.write('<script src="addEventListener.js"></script>');
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