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Promises in JavaScript Unit Tests: the Definitive Guide

JavaScript promises simplify asynchronous coding, but testing them can be tricky. This guide clarifies how to effectively handle promises within unit tests, avoiding common pitfalls and improving code readability. A sample project illustrating thes

Feb 19, 2025 pm 12:21 PM

Using the Media Capture API

This article explores the Media Capture and Streams API (getUserMedia), enabling webpages to access webcam and microphone without plugins. Supported by major browsers including Chrome, Opera, Firefox, and Edge. The API offers video, audio, and imag

Feb 19, 2025 pm 12:14 PM

Creating a Battery viz Using Node.js: Client

Key Takeaways The article describes how to build a client part for a battery visualization service using Node.js, which updates the battery status at regular intervals without reloading the page. The client can pause or resume updates to avoid ove

Feb 19, 2025 pm 12:13 PM

Composition in Aurelia.io: Creating a Report Builder

This article explores Aurelia's visual composition, a powerful feature for building complex UIs using reusable components. Instead of the usual trivial demos, we'll build a report builder application showcasing this capability. A live demo and sour

Feb 19, 2025 pm 12:10 PM

How to Respond to Profit Share Offers

Many freelancers have encountered this scenario: a client presents a seemingly brilliant idea but lacks the funds to pay for your services, instead proposing a profit-sharing arrangement. While the promise of riches is tempting, proceed with extreme

Feb 19, 2025 pm 12:09 PM

How to Create Form-Based Directives in AngularJS

Core points Use AngularJS directive to create reusable form components, with independent scopes that enhance the modularity and maintainability of web applications. Implement custom verification methods in directives to handle complex input verification, ensuring data integrity before being submitted to the server. Quickly establish client input verification using AngularJS built-in form verification technologies (such as ng-required and ng-pattern). Use FormController in AngularJS to manage form status and verification, provide instant feedback to users and improve user experience. Use the ng-submit directive to handle form submission in AngularJS, blocking the default

Feb 19, 2025 am 11:52 AM

CSS Pseudo-classes: :not() and :target

This article explores the versatile CSS pseudo-classes :not() and :target, showcasing their power in creating sophisticated and targeted styles. We'll delve into their functionalities and demonstrate practical applications, including building JavaSc

Feb 19, 2025 am 11:29 AM

Asm.js and WebGL for Unity and Unreal Engine

This article explores the power of asm.js and WebGL for creating high-performance web applications, focusing on their integration with Unity and Unreal Engine. It explains how these technologies allow developers to leverage C and C code within the

Feb 19, 2025 am 11:28 AM

First Look at Themosis, a Framework for WordPress Developers

Themosis: A Modern Approach to WordPress Development My disdain for WordPress's tangled codebase is well-known. I advise against its use unless you're technically proficient. However, my criticism stems from a desire for improvement—a hope that a sup

Feb 19, 2025 am 11:13 AM

Writing Element Queries Today Using EQCSS

Element Queries: Responsive Design Beyond Viewport Limitations This article explores element queries, a powerful technique extending responsive design capabilities beyond traditional media queries. Unlike media queries that react to viewport dimensi

Feb 19, 2025 am 11:10 AM

Preloading Images in Parallel with Promises

Core points Use Promise to load pictures asynchronously, allowing different collections of images to be loaded at the same time, and executing code after the collection is loaded. This significantly improves website performance by reducing overall load time. This technique involves creating a shared preloader for all image "groups" (collections) that queues up the images to be loaded. The preloader then starts loading the pictures in parallel (rather than in sequence), avoiding having to wait for one group to complete before the next group is started. Each image URL is replaced with a Promise, which is parsed after the browser loads the image. You can then use the Promise.all() method to create a Promise for each group, which is in the array

Feb 19, 2025 am 11:01 AM

What's New in Ember 2.0?

Ember.js 2.0: Stability and Refinement in a JavaScript Framework Ember.js 2.0 arrived with the tagline "Stability without Stagnation," signifying a focus on solidifying existing features rather than introducing major new ones. This release

Feb 19, 2025 am 10:06 AM

How I Became an e-Resident of Estonia

Estonia's e-Residency: A Digital Nomad's Dream? Estonia's e-Residency program offers a compelling proposition for global entrepreneurs: a government-issued digital identity enabling the online operation of a trusted company. This attracts entreprene

Feb 19, 2025 am 09:17 AM

9 JavaScript Libraries for Working with Local Storage

The HTML5 local storage API (part of Web storage) has excellent browser support and is being applied in more and more applications. It has a simple API, but it also has some disadvantages similar to cookies. I've come across quite a few tools and libraries that use the localStorage API over the past year or so, so I've sorted them out into this post with some code examples and feature discussions. Important points The HTML5 local storage API is widely supported and is becoming more and more common in applications, but it also has some limitations similar to cookies. Various JavaScript libraries have been developed to improve and extend their capabilities. Lockr, store.j

Feb 19, 2025 am 08:47 AM