JavaScript Exercises

ECMAScript 2021 has added a new String function replaceAll. A long time ago in a galaxy not so far … Read more Javascript String Replace Vs Replaceall

Which method below is best to define a constructor prototype and why? Method 1: MyConstructor.proto… Read more Define Constructor Prototype With Object Literal

I have nested CSS grids with auto columns (fixed heights are no solution) and want the rows of the … Read more Alignment Of Rows In Nested Css Grid

Help me please! I have two pages: Home, About and a component SecondPage. This component has two ta… Read more Data Is Clearing When I Click Route Page About In Vue

I have a string that has been converted into an 2D Array in js. board = '...|.X.|...|' It i… Read more Javascript Multidimensional Array Updating Specific Element

Note: This post has been posted at the time React was NOT supporting ES6 (v12). I have an ES6 class… Read more React And Es6 Inheritance

As far as I see, free-jqgrid uses jlinq to filter and search data. I am making my own filters, tha… Read more How To Filter Jqgrid Data But Not The Grid Itself

I'm going to use various data attributes names start with for example 'data-mo-'. Assum… Read more How To Check If Some Element Has Attribute "name" Starts With Something, Not "value"

I am using PayPal checkout script on Angular5. I am trying to split a string which contain the pri… Read more Validation Error In Paypal Checkout

My template is used for JS let SETTINGS = {{settings|tojson(4)}}; My settings is a dict {'name… Read more How To Make Tojson() Filter In Jinja2 Output Unicode Instead Of Escape Sequences?

I know I can read the URL of the current page, but is it possible to read the url's of all open… Read more Getting The Url's Of All Open Tabs With Jquery/javascript?

I'm doing a WebApp where people will upload 2 images which I need to pass through a python code… Read more How To Enable Submit Button Until Condition In A Multiple File Uploader?

I am working on a three.js project that allows the user to switch through scenes that hold differen… Read more Disposing Objects And Restoring Them

I am using Jasmine 2.0 and require.js. I cannot get the async tests to work properly when I put the… Read more Jasmine 2.0 Async Beforeeach Not Waiting For Async To Finish

I've found a lot of related questions (here and elsewhere), but haven't found this one spec… Read more Javascript: Keydown Event: "up" Arrow Key Preventing Further Arrow-key Keydown Events? (answered: Keyboard Ghosting)

I know this has probably been asked before, but I can't find where: I know you can detect JS er… Read more Detect All Js Errors, Using Js

I am currently trying to create a website which gets its information live from an API. For this, I … Read more Execution Order Within Js Script

I am trying to get data remotely via AJAX. When I look at the data via document.write(obj), I get t… Read more How Do You Extract Content Out Of Object?

There are a lot of questions/articles written on the numerous ways to handle binding in ES6 React, … Read more Es6 React: Will Es.next's @autobind Bind Methods Only Once For Each Instance?

I'm able to accomplish this in Google Spreadsheets, below is a screenshot: Here's the smal… Read more How Can I Make A Stepline Or Stepped Chart In Chart.js Or D3?

I am trying to pass 2 objects into a function to see if they would collide, and destroy them both i… Read more (p5js/javascript) Got An Error Trying To Pass In 2 Objects Into A Function: Uncaught Typeerror: Object Is Undefined

I am trying to pass data from a Dialog back to the component from which the user opened the dialog … Read more How To Pass Data To Afterclosed() In Angular Material Dialog In Angular 6

I want to have a svg dashed line drawn on scroll and got stuck on this for 4hrs. If it's just a… Read more Draw Svg Dashed Line On Scroll?

I have some div: Now I want to load into this div an external html file and use its js functions.… Read more Load External Html File To Div And Use Its Js Functions

I'm wondering why this code doesn't work, var uniqueInteger = function() { var counter … Read more Making Counter Using Closure And Self-invoking Function

I tried the following code in the Google Chrome console and I’m getting this output. Why is there a… Read more Why Does This `do`–`while` Loop Repeat The Last Value After The End?

Help needed. Im writing a function that returns result of ajax call but i did not get any results, … Read more Javascript Function That Returns Result Of Ajax Call

I have the following mocha test case, I'm trying to print the webdriver logs in the end, but it… Read more Webdriverjs : Driver.manage().logs().get('browser') Returns Empty Array

I have a problem with a slider: slide content should stay fixed to the right bottom corner and pref… Read more Slider Content Moving Along With Slider

I have a JSON object that when I do this: console.log(response.json); I get this { results: [ {… Read more Selecting A Specific Item In Json Array

running docker mhart/alpine-node:8 on macOS with nodejs (6.10.3-r0) (18/18) yarn 0.24.6 jest … Read more Jest No Tests Found

I have a webpage that uses jquery to display a submenu div while a user is hovering over an a:link … Read more Displaying Submenus On Hover Without Javascript

I have a requirement to display all the countries in the world in a drop down. So I found this api … Read more Java Script Fetch Returns 200 But No Data

I'm using Jest and Enzyme to test a React functional component. MyComponent: export const get… Read more Trigger Useeffect In Jest Testing

I'm fairly new to javascript and I'm having trouble finding a memory leak in some code whic… Read more Memory Leak Using Google Charts With Ajax

I have to do jQuery form validation for password. The password should contain at least two special… Read more Regular Expression To Match At Least Two Special Characters In Any Order

Is there any way where I can pass in multiple values in a single prop? Right now how it works is I … Read more How Can I Pass Multiple Values In A Single Prop In React?

I've just started to learn the Fetch API: https://developer.mozilla.org/en-US/docs/Web/API/Fetc… Read more Javascript Fetch Api - Why Does Response.json() Return A Promise Object (instead Of Json)?

I need run startFunc function synchronously and 'wait' in for loop to finish task, to run i… Read more Wait In For Loops For Async Function

In Node.js is there any way to listen to all events emitted by an EventEmitter object? e.g., can yo… Read more Listen To All Emitted Events In Node.js

This, of course, returns what you would expect: ['A','B','C'].map(function … Read more Why Doesn't ["a","b","c"].map(string.prototype.tolowercase.call) Work?

as the title says, I'm trying to publish a message on ros using rosbridge, because my app is wr… Read more I'm Trying To Publish A Message Of A Tizen Based App On Ros Using Rosbridge And I Get An Error

Here is an example. Check the console for the result. The first two divs (not appended; above the Read more Appending Elements To Dom With Indentation/spacing

I am using Tabulator, I need to add input box that takes you to a desired page. If you have 10 page… Read more Desired Page In Pagination With Tabulator

I have an counter that loads when starts when a page is loaded and stops when the time == 0 fires a… Read more How To Stop Timer.setinterval With A Tap Event Or Leaving Page In Nativescript

I have a daily deal aggregator site and i can't get the Facebook share to work properly. There … Read more Multiple Facebook Shares On One Page

I can't figure out why the apply trap isn't being called here: The output is: p1 descripto… Read more Javascript: Why Doesn't Proxy Intercept Methods

I want to change a keyframe state dynamiclly with JQuery. Here's my keyframe: @keyframes moveIt… Read more How Can I Change Keyframe State In Javascript

I am building a game that players can attack each other by turn. So first I set the name, jobmanual… Read more (react.js )initial State Generated Randomly. How To Prevent It From Regenerate Each Time I Handle An Event?

I'm an Italian PouchDb and AngularJS Developer. My json document is: { '_id': '… Read more Pouchdb - Remove Object Inside Document

I've this very simple JavaScript to display the selected option in the span. It works fine in a… Read more Javascript: Getelementbyid Not Working In Ie8

I have used blockUI PLUGIN from https://github.com/McNull/angular-block-ui Problem i'm facing i… Read more Display Loading.. Gif In Angular-blockui Plugin

I'm trying to split a date string (04.05.2012) into 3 sub-strings for later string manipulation… Read more Selenium Split Date String Working Example?

Pushing Data Like This: myDataRef.push({name : name, text: text}); I don't want every Push to … Read more Firebase Help : Avoid New Id On New Push

i am making a program that will calculate the present age using user's date of birth but even a… Read more Number Function Returning String

Is there an alternative version of the FB friend picker? I have noticed on a number of FB games tha… Read more Alternative To The Default Friend Picker?

I'm trying to display a bootstrap modal when a person first visits a page (after logging into m… Read more Display Bootstrap Modal First Time Page Loads

This loads jquery only once: The same is true for: Solution 1: As a workaround, you could import… Read more How To Make Script Loading And Es6 Module Loading Working Together?