javascript blogs

See http://jsperf.com/in-vs-member-object-access Essentially, why is checking if ('bar' in … Read more Why Is Javascript's "in" Operator Consistently Slower Than Strict Member Comparison To Undefined?

For example: . foo's value stays the same during input. I'm trying to solve the issue for… Read more Vue: V-model Doesn't Work With Dynamic Components

I have a HTML select like this: a b c and I hav Solution 1: You first need to add values to yo… Read more How To Set Default Value For Html Select?

When using onEnter to redirect to a state, if the new state is a child of the current state, an inf… Read more Angular Js Ui-router How To Redirect To A Child State From A Parent?

I have a stacked bar chart whose labels will not show on IE, but will on Chrome and Firefox. The l… Read more D3.js Chart: Labels ( Tags) Not Showing On Ie11

I'm building a visualization of a 24 hour period with this bar. It starts at midnight on the le… Read more Html5 Canvas - Fillrect() Incorrectly Draws The Rectangle

I have a scatterChart with too many points in nvd3 that looks like that: It is very computationall… Read more Convert Scatterchart Into Linechart

for (let i=1; i Solution 1: It is actually quite simple. The for loop schedules the timer functi… Read more For Loop, Let, And Settimeout

I am using JQuery UI autocomplete-loading spinner in my project by adding .ui-autocomplete-loading … Read more Jquery Ui Ui-autocomplete-loading Spinner Not Stopping/disappear When Found Results

Is there a way to implement swipe gesture navigation on a jQuery Mobile multi-page template mobile … Read more Using Swipe Gestures To Change Pages In Multi-page Jquery Mobile Application

I'm still learning JavaScript and practicing with getting input from a keyboard. I just learne… Read more Can You Use String.fromcodepoint Just Like String.fromcharcode

i have a object that contains a fromJson method. this method is not working because private propert… Read more Typescript: Specified Object With Fromjson Method, How To Test If Private Property Exists And Than Set It

I want to detect if remote website allows to stand under iframe or not. For example if website does… Read more Detect If Remote Website Is Frameable

This code: https://github.com/bjornharrtell/jsts/blob/master/index.js refers to a variable named &#… Read more What Is The Global Variable In Javascript?

I have a form that is of variable size (length) that is populated from a MySQL db. There are 4 fie… Read more Passing Variable Sized Form

I want to have the background image of a page change every 5 seconds. There are 5 images and I want… Read more Change Background With Setinterval

I saw a flash website and was curious to now if this is something possible to build using Jquery, o… Read more Fade Out/in Sperate Divs With Button Click

How can I move an image element across a page? As an example, Vimeo does this with an image of a cl… Read more Move An Image Across A Web Page

What is the equivalent code in vanilla js to this line of javascript? $('html, body, #wrapper&#… Read more Equivalent To Setting Html And Body Height To Window Height In Vanillajs

I have created vuejs project with vue-cli tools and webpack template. vue init webpack my-project … Read more Vuejs Lazy Loading Routes In Webpack Template

Currently I have a file called router.js set up as follows: var Server = require('mongodb')… Read more Reading A .config File

I've been working on Create Firefox extension. i can inject some js file for all webpages. this… Read more Call Jquery Function After Page Load Not Working - Firefox Extension

I got a requirement from client to delete file from his local pc after upload. It should ask to use… Read more Deleting The File From Client Pc After Upload But Only After Client Permission

I have a database in MongoDB like this {'productId' : 1, 'isVariant': 1, 'varia… Read more How To Return The Variant Values Of Each Product If That Product Is A Variant?

This question is for purely for learning purposes. funfunfunction on youtube says that Any list … Read more How To Rewrite An Array.every() In A Custom Array.reduce() In Javascript?

I'm using the PHP class 'Mobile Detect' to detect user device type (tablet/phone) howev… Read more Javascript - Regex Matching Devices On User Agent

I have a Gulp build task that is made up of other build tasks similar to this: gulp.task('build… Read more Gulp Tasks From Within Other Gulp Tasks?

I am a backend developer who got a little project to fix it. So my boss gives me an electron projec… Read more Electron Does Not Listen Keydown Event

I'm creating a 'HTML editor' for a webpage of mine. At the moment, I only want the edit… Read more Disable Javascript Entry Into Form

I'm trying to build a form to allow multiple elements (unknown number) to be entered and then p… Read more Jquery - Renaming Checkboxes Sets Consecutively

Here is my code: Read more Javascript - Radio Button Onchange

Supposed i have a function that merge the duplicate in string and append the value with comma let c… Read more Merging The Duplicate In String And Append It With Comma Gives Wrong Output

There is something I don't understand in javascript and broke down a sample problem to an essen… Read more Passing Around Function Including Its Context In Javascript

I'm using jQuery DataTables and I have a problem when I'm sorting my time column with this … Read more Datatables Sorting Time Column

I can't figure out why the following code doesn't work on my site, but works great on JSFid… Read more Jquery-line $(this).nextall('.toggled:first') Works In Stack Snippet And Jsfiddle, But Not On Site

I have this code... function a(options) { for (var item in options) { if ( ! options.has… Read more How Can I *unpack* An Object Into A Function's Scope?

I'm have a PHP and MYSQL based newsfeed. To get new content, the user has to refresh the page. … Read more Php Newsfeed With Reload

I'm using Azure Mobile Services(AzMS) in VisualStudio JS-Apache Cordova project where I call a … Read more Azure Mobile Service Invokeapi Not Working From Cordova Project

I am working on a CSV parser, where I have data in array like ['Jonas', 'Sched ', &… Read more How To Make Object Of Comma Separated Elements

The below given code illustrates what I have done fro hide/show. It does work on load but wouldn… Read more Jqgrid Showcol/hidecol Not Working After Sorting

I have a two-dimensional array that contains strings and integers. In GAS I want to create a new ar… Read more Group And Average Array Values Based On Index

I wish to scale the body of my website acording to resolution, but the code not seems to work: docu… Read more Changing Page Scale Via Javascript

I am developing a web page using JavaScript and HTML, everything was working good when I have recei… Read more Resource Blocked Due To Mime Type Mismatch (x-content-type-options: Nosniff)

I have a control panel for restaurants and it plays an alert sound when an order is given. The prob… Read more Playing Sound From Inactive Browser Tab

Got what is probably a simple one, but my google is failing me at the moment so hoping i can get a … Read more Javascript Variable To Bootstrap Modal

I want to use JSON to represent JS objects send them to a Java program, and vice versa. I would als… Read more Json, Js To Java And Vice Versa, And Other Languages

I don't know why as it seems to be all correct and there are no errors in console. It always st… Read more What's Going Wrong With My Timed Traffic Lights Program?

I want to be able to make an iphone and android app using php. I have looked at phonegap and appcel… Read more Is It Possible To Create A Php Based Iphone/android App With Phonegap Or Appcelerator?

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 have an uploaded image in Firestore and I am able to get download URL in my Angular application. … Read more Insert Firestore Uploaded Image In Jspdf

I call my HTML with googlemaps from another application by window.open (javascript). The html page … Read more Google Maps Doesn't Work In Internet Explorer 11

So some time ago I developed a web application that allows users to launch a system application and… Read more Managing Html5 Div Size

I have a form with 4 inputs and I want to show an alert on submit. What I have done is that I have … Read more Js->form Validation On Inputs. Using For Loop To Get All The Inputs Index

As you can see I want to somehow remove the dotted lines after the button has been clicked.Any id… Read more How To Remove The "dotted Border" On Clicking?

I am trying to call a AS3 function from javascript but getting the following error in browser: Obje… Read more As3 Function Call From Javascript

I need code to automatically hide div1 and show div2 after a specific amount of time, say 10sec or … Read more Show And Hide Divs At A Specific Time Interval Using Jquery But Stop The Last Div

Is there any difference between limiter 1 and limiter 2? var limiter1 = function(limiter){ retur… Read more Closure Or Bind

I am new here, and to programming as well. Anyway, to get in topic I wrote the following program wi… Read more Javascript 2d Array Generation Doesn't Work As Intended

I'm using BreezeJS to handle server-side filtering of an ng-grid. To do this, I'm just $wa… Read more Preserving Asynchronous Query Order In Breeze/angular

I'm trying to load webpages on an another webpage (not hosted on my server), but due to cross-s… Read more Certain Websites Won't Appear With Iframe And .load() Function

I am trying to customize a view-src bookmarklet for iPad. This one is looking pretty good so far. … Read more How To Specify A Font From Javascript?

I want to have a regex for a date format, Example: 01-Jan-2011 I have written ^[0-9]{1,2}-[a-zA-Z]{… Read more Regex For A Particular Date Format

I have a react-big-calendar (The parent container), I have also a select which, the events of the c… Read more How To Send Data From Dialog Back To Parent Container With React?

I'm trying to use a smaller canvas as a viewport for another much bigger canvas. I really like… Read more Viewport From Bigger Image With Html5 Canvas