Questions tagged [javascript]

JavaScript (not to be confused with Java) is a high-level, dynamic, multi-paradigm, weakly-typed language used for both client-side and server-side scripting. Use this tag for questions regarding common implementations of ECMAScript, JavaScript, JScript, etc. JS does not typically refer to its ECMA-cousin, ActionScript.

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Convention to where to declare module.exports on Javascript files

Is there any convention to where we should declare the module.exports no Javascript/Node.js module files? Should it be in the beginning of the file like: module.exports = Foo; function Foo() { ...
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1answer
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Prevent Click Fraud in Advertisement system with PHP and Javascript

I would like to build an Advertising project with PHP, MySQL, and Javascript. I am talking about something like... Google Adsense BuySellAds.com Any other advertising platform My question is mainly,...
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How do you unit test your javascript

I spend a lot of time working in javascript of late. I have not found a way that seems to work well for testing javascript. This in the past hasn't been a problem for me since most of the websites I ...
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1answer
443 views

Building a computer system with JS? [closed]

I recently finished this book called The Elements of Computing Systems where you build a working computer system from the ground up, starting from basic logic gates, to creating your own machine code ...
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15answers
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Is obtrusive JavaScript ever ok?

I was thinking that if all the users of a website are required to have JavaScript enabled, Is it ok to use obtrusive JavaScript? I'm all for progressive enhancement, but what's the point when an ...
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13answers
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Would a statically typed alternative to JavaScript on webpages be practical?

Preference for dynamic and static typing is largely a matter of taste, and different people find them more or less suitable in different situations. My question is, would it be technically possible ...
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What does Google or Microsoft get by hosting JS files on their Content Delivery Networks (CDN)?

As you know Google, Microsoft and jQuery.com offer JS files on their CDN. To do this, they must need to operate significant servers which must come at a cost to them. Why do they do this and what do ...
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3answers
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Has Javascript developed beyond what it was originally designed to do?

I've been talking with a friend about the purpose of Javascript, when and how it should be used, etc. He quoted that: JavaScript was designed to add interactivity to HTML pages [...] ...
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3answers
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Is a function getting a value from another function considered pure?

I'm trying to figure out a way to handle default variable values when making functions without side effects and have ended up with the following: function getDefaultSeparator() { return ':'; } ...
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5answers
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PHP, HTML, Javascript and writing good practices

I realized I have to write down a convention specification about HTML, JavaScript and PHP coding for me and my team. In web development, just like in C++, I'm definitely a fan of indentation and ...
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2answers
627 views

How can I _read_ functional JavaScript code?

I believe I have learned some/many/most of the basic concepts underlying functional programming in JavaScript. However, I have trouble specifically reading functional code, even code I've written, and ...
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5answers
803 views

What is the historical basis of using Javascript in web programming?

I come from a scientific biology background where we also use Python a lot. Now that I've begun to start with Web development, I've consistently found myself wondering just why it is that JavaScript ...
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4answers
972 views

Could a programming language work as well without statements?

As programming in JavaScript, I've noticed everything that can be done with statements and blocks can be done with expressions alone. Can a programming language work fine with only expressions? And, ...
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4answers
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Better ways than traditional polling methods

I'm currently in a AngularJS/Javascript environment. Currently the application using the polling method (i.e, to retrieve new data from server in a fixed amount of seconds). This is quite taxing ...
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2answers
375 views

Jumpy Code with Descriptive Function Names

I'm currently building out some functionality on a page. When writing JS I've been making a set of smaller functions like FindCarouselLocations(elem), GetImagesFromLibrary(url), and BuildCarousels(...
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1answer
860 views

Hoisting in Javascript === Compiling?

I came across an interesting perspective at a recent job interview. Hoisting in Javascript is about moving the variable declarations and function declaration at the top of the script. Can we call ...
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3answers
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What stops HTML5 and JS apps to perform as good as native apps?

From what I understand, HTML is a mark-up language, so is the content of XAML, XIB and whatever Android uses and other native UI development frameworks. JavaScript is a programming language used ...
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2answers
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Is automatically generating passwords during registration a good idea?

I'm developing a registration system for a project I'm working on. Since users tend not to sign up if the process is too long, I've thought to require (at least initially) just their email, where I ...
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3answers
1k views

Does it make sense to use jQuery in modern-webkit-only web applications?

I'm lately working on a few mobile web apps for Android (2.3+) and iOS (4+). Their browsers support most of ECMAScript5, which is very powerful, and I wanted to use language features where possible, ...
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3answers
395 views

Cross-language Test-Driven Development

The short question: How do you follow Test-Driven Development on a project that spans multiple languages? Specifically, I'm writing a web application that uses JavaScript and PHP, and I want to ...
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3answers
2k views

Choosing a JavaScript Asynch-Loader [closed]

I’ve been looking at various asynchronous resource-loaders and I’m not sure which one to use yet. Where I work we have disparate group-efforts whose class-modules may use different versions of jQuery (...
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2answers
615 views

Doesn't dependency injection push the testing burden further down the chain?

I'm learning about dependency injection and while I can see the appeal of it when writing functional libraries, I fail to see how it solves anything when you'll also be the one using the libraries. ...
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2answers
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Moving all UI logic to Client Side?

Our team originally consisted of mostly server side developers with minimum expertise in Javascript. In ASP.NET we used to write a lot of UI logic in code-behind or more recently through controllers ...
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2answers
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Are side-effects in Array's “every”, or “some” bad?

I've always been taught that having side-effects in an if condition are bad. What I mean is; if (conditionThenHandle()) { // do effectively nothing } ... as opposed to; if (condition()) { ...
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Who first created or popularized the original XMLHTTPRequest / MSXML?

I'm trying to understand the origins of AJAX, and think MSXML and XMLHTTPRequest were the objects that started it all. Which came first, and/or became the defacto way to create dynamic pages?
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2answers
744 views

Do I need to paste open source license information at the top of my webpage?

I'm developing a JavaScript application that uses several open source JavaScript projects. All their licenses have a phrase like "You must give any other recipients of the Work or Derivative Works a ...
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1answer
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Is there a reason not to use HTML5 local storage for content

On many static websites the total size of the actual text content of the most popular 20 pages would come in at under 100kb. I would imagine that it would be possible to leverage HTML5 local storage ...
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1answer
737 views

Is obtrusive JavaScript required to support a feature of AngularJS?

I'll start by saying I'm just learning about AngularJS, and I was reading this article, which seems to advocate for obtrusive JavaScript as the right thing: http://www.ng-newsletter.com/posts/angular-...
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2answers
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Javascript MVC application design (canvas)

I'm having difficulty grasping how to structure/architect a canvas application using an MVC like approach in Javascript. UI will be fairly fluid and animated, the games fairly simplistic but with ...
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2answers
13k views

What is the recommended approach for helper functions in JavaScript?

What is the recommended approach for helper functions? I would like to choose one technique, and run with it to create my new "class". Here are the design options I have pondered: Option 1: Helper ...
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6answers
6k views

Code review guidelines for CSS, JS and HTML

I have been asked to create guidelines for review CSS, JS and HTML. I know there are coding guidelines for JS but I don't know any about HTML and CSS. To review JS I will certainly follow those ...
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2answers
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Unit Testing a stateful framework such as Phaser?

TL;DR I need help in identifying techniques to simplify automated unit testing when working within a stateful framework. Background: I'm currently writing a game in TypeScript and the Phaser ...
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1answer
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How to avoid module dependency chain nightmare caused by transitive dependencies?

Many (most?) AngularJS folks seem to advocate for breaking AngularJS apps up into many modules. Brian Ford in his blog already states that packaging by layer (controller, service, etc.) is a "silly" ...
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12answers
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How to become a JavaScript ninja? [closed]

I want to choose JavaScript as my main development field, alongside HTML and CSS to become a developer commonly known as front-end developer. But I don't know how to become a JavaScript professional. ...
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3answers
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Benefits to starting JavaScript “for” loops at 0, or just traditional? [duplicate]

Possible Duplicate: Defend zero-based arrays I'm running code that loops through an array of HTML IDs. With the HTML IDs named content1, content2, …, content12, my loop looks like: for (var i = ...
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9answers
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How to become an expert in Python, PHP and Javascript? [closed]

So I've been programming for about 9ish months now, and I've taught myself some Python, some PHP and some Javascript. I want to become better at these languages - I can hack something out, but a lot ...
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6answers
8k views

Focus on Javascript or Jquery? [closed]

I am a student in college, and I notice that a lot of companies look for people who have experience with Javascript. Does this include Javascript's libraries, like JQuery? Or, are they looking for ...
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3answers
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camelCase, PascalCase, or underscore if you start from scratch with reactjs?

Title says it all. Can't seem to find what is most common out in the world. I'm brand new to programming. If the answer is "it depends", I would love to know what it depends on. Here to learn.
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4answers
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Did jQuery kill the JavaScript discussions? [closed]

There are over 100,000 questions on Stack Overflow tagged as questions relating to JQuery troubleshooting/usage. Compare this to the 124,000 questions on stack overflow that are tagged for JavaScript ...
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2answers
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A real-life example of using curry function? [closed]

I was struggled to find a real-life example of using curry function and get the benefit of using curry. When I google curry function I often see the example like let add = x => y => x + y; ...
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3answers
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Ajax race conditions

Is there a pattern or standard way to handle Ajax race conditions? Take the following example. You have two tables. Clicking a row on table 1 removes the data from DB and then updates table 2 (which ...
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6answers
616 views

Is it considered bad practice to run different JavaScript for IE

Is it considered bad practice (and how bad) to run different JavaScript for IE? Currently im writing some JavaScript and the simplist way to work arround IE quirks seems to be to check for browser ...
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3answers
30k views

If statements vs switch cases? in a JavaScript game and if to use a function [duplicate]

I am developing a game in JavaScript where you start with a user input, stored in the variable "controller". The options for the user consists of start to start the game or about to learn about the ...
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4answers
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How to avoid javascript becoming spaghetti code?

I've done quite a lot of javascript over the years and I'm using a more object-oriented approach, specifically with the module pattern. Which kind of approach do you do use to avoid a bigger code-base ...
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2answers
9k views

Client-side Rendering vs JSP's for Spring MVC Front End Dev

Firstly, a note on the app I'm about to discuss: It's quite large, on the order of magnitude of a service app like Airbnb -- i.e., it's not just a static web page, it is a full web application. It's ...
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1answer
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How do I decide what testing framework to use?

The situation is this. I'm a junior developer for a small government IT project. We don't have anything of continuous integration or a automated testing framework. But the idea is to be developing ...
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4answers
3k views

JavaScript application design patterns [duplicate]

I need to write a PhoneGap application with JavaScript and I'm thinking of the code design patterns. I've read some books of JavaScript design patterns but can't really see the advantages/...
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4answers
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What are the best practices for rapid prototyping using exclusively HTML/CSS/JS [closed]

I'm developing a prototype of a web application. I want to only use HTML, CSS and Javascript. I prefer to use my text editor and not having to learn (or pay, for that matter) a new tool like Axure. ...
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2answers
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Should the ternary operator be used outside of assignment statements?

Edit This isn't a question of whether or not the ternary operator is harmful. It's about whether or not there's a consensus about whether or not it should be used outside of assignment statements. /...
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What common programming problems are best solved by using prototypes and closures?

As much as I understand both concepts, I can't see how can I take advantage of JavaScript's closures and prototypes aside from using them for creating instantiable and/or encapsulated class-like ...