logo
down
shadow

How to track a javascript function?


How to track a javascript function?

Content Index :

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.

Comments
No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

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 () {
        ++runs;
        // your function here
    };
    f.runs = function () {
        return runs;
    };
    return f;
}());
asdf();
asdf();
asdf.runs(); // 2
asdf();
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 = []
$('div').click(function() {
    clickedColors.push($(this).css('backgroundColor'));
});
window.location='?name='+this.id
window.location='?name='+this.id+'&color='+this.style.backgroundColor

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 {
  yourFunctionCallHere();
} 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>');
}
Related Posts Related QUESTIONS :
  • When I enter a number in the input, the first function starts
  • ES6 imports and node_modules hell
  • How to get css selector of clicked-on element?
  • How to auto input MySQL data (input column 1 data to auto input column 2 data with same column) in php?
  • Appending to Datalist Via Javascript
  • Customizing Material-UI Components with Styled-Components
  • Populate elements with class name using Javascript
  • How to execute promises in batches (first resolving 10, then next 10 and so on)
  • Maximo JS automation script: "importPackage" is not defined
  • How to surround selected text inside textarea with <em> on key combination CTRL+i?
  • Your configured registry does not support audit requests ~ On npm audit
  • What's the Angular equivalent of Vue <slot/>?
  • Iconify icon not updating when "data-icon" set with setAttribute()
  • Javascript newbie stuck with XMLHttpRequest return data
  • How to add obj to to state in my example Redux React
  • Loading "grunt-karma.js" tasks...ERROR >> SyntaxError: Unexpected identifier
  • Why do I get log is not defined
  • get the multiple index of the same string
  • How can I iterate over an Array object by using For IN or FOR OF
  • Launch local executable from web browser
  • How to prepare array of json objects to d3 hierarchical tree structure
  • VueJS - event emitted - show HTML before other calculations
  • Export SASS/SCSS variables to Javascript without exporting them to CSS
  • How to attach an event handler only once continuously
  • How to make button open a link in new tab in JavaScript?
  • Find range from the javascript object
  • How can I use my jQuery code as JavaScript?
  • How to show 5 images in a 2 row slider with bxslider
  • How to convert stream into variables in typescript
  • Three.js custom shader error on Chrome GL_INVALID_OPERATION: Active draw buffers with missing fragment shader outputs
  • My JavaScript doesn't work. How can I solve this problem?
  • Why is this async function is running synchronously?
  • Get updated variable from within react hook before return
  • I want to show all image preview but whenever I upload a new one the old one is gone
  • Would I be able to give access to specific electron APIs safely?
  • Why several clicks fire for each instance of a Class?
  • cant grab value from div using attr()
  • Make web service not accessible by browser?
  • Select DOM elements within template
  • How to customize angular ui-grid row background color?
  • Binding data in two respective $scope in AngularJS, how?
  • react put some props after import class
  • Variable is distributed among same components
  • switch class in jQuery/JavaScript for active/inactive state
  • How To Track Outbound Clicks Using Javascript
  • How to get total seconds elapsed since the beginning of the month?
  • Protractor: Stale element reference at "browser.wait(EC.visibilityOf(confDial), FIFTY_SECONDS);"
  • Access to an array inside an object
  • Reseting an JavaScript Interval with different value?
  • Learning Angular for the first time - version 2 or 4?
  • Rendering RSS feed (XML) in React with jquery, why do object values parsed from the feed seem empty?
  • Node.js xml2js http.request tag matching
  • applying texture to custom plane geometry in Threejs
  • How do I pass an Event as a function parameter in HTML written inside JavaScript variable?
  • Interface of object parameter with default value and default property
  • Does using try / catch rather than `.catch` observable operator with XHR requests reduce performance?
  • In IE11 background colors not working on printing
  • TypeScript interface signature "(): string"
  • Is synchronous XMLHttpRequest supported in Internet Explorer 10 and 11?
  • Axios function not returning any values with js
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com