Treehouse Blog
December 2, 2025 in Learn How to Choose the Right Learning Path in Tech Choosing a learning path in tech can feel overwhelming when you’re just starting out. With so many options, from design to coding to data, it’s normal to feel unsure about where to begin. The good news is that you do… Front-end web development is one of the most approachable ways to begin learning how the web works. If you enj
Opera News
Gaming, Opera GX Opera GX gets new AI update December 4th, 2025 We’ve been hard at work rebuilding and refining the AI in Opera GX to give you a smoother, more efficient... Desktop Split Screen revamped in Opera Developer November 26th, 2025 Today we’re bringing another update to Opera Developer as part of the Opera One R3 roll out process. This time... AI How to opt-in and upgrade to the new Oper
YetiでJavaScriptのテストを動かす方法
Yeti はYahoo.comがメインで開発してるNode製のTest Runner的なCLIです。 Yeti自体はテストの構文とかは持っていなくて、Test Frameworksに書かれているようにQUnitやJasmine、MochaやYUI Testなどで書かれたテストを動かすツールになっています。 雰囲気的にはTestemに似ていて、上のTest Frameworksで書いたhtmlページを用意して、 キャプチャー用のURLを作って、そこにテストしたいブラウザをキャプチャーして、テストを書いたhtmlを指定して実行させるという感じです。 (意味的にあんまり変わらないですが、先にテスト用htmlを指定して、ブラウザにアクセスさせるという逆の手順もできます) Yeti自体は数年前からあって、Bunyipとかでもインスパイアされてたりします。 動かしてみる QUnitやJasmine、M
最強オブジェクト指向言語 JavaScript 再入門！
この資料では、JavaScript でオブジェクト指向プログラミングを行う際に備えておくことが望ましい、基礎知識や概念について解説します。 【対象者】 ・JavaScript でアプリケーションを構築できる方 ・JavaScript におけるオブジェクト指向プログラミングの 実現手法や原理への理解を深めたい方 ・Java 的なクラスベースの言語との違いに違和感や混乱を 感じてらっしゃる方
Advanced Unit Testing Techniques in JavaScript | Envato Tuts+
By now, everyone knows about Test-Driven Development and unit testing. But are you using the testing frameworks to their fullest? Introduction In this tutorial, I'll introduce you to some of the more advanced techniques available to you. As this tutorial will cover some advanced topics, I assume you've already created unit tests before and are familiar with the basics and its terminology. If not,
Writing a Javascript REST client
The HTML code that achieves the above look is: <table class="table table-striped"> <tr><td style="width: 1px;"></td><td><b>Task</b></td><td><b>Options</b></td></tr> <tr> <td> <span class="label label-success">Done</span> </td> <td><p><b>Task title</b></p><p>Task description</p></td> <td> <button class="btn">Edit</button> <button class="btn">Delete</button> <span><button class="btn">Mark In Progres
Basic JavaScript for the impatient programmer
Two things contradict what we have said about primitives versus objects: The type of a function is 'function' and not 'object'. Given that Function (the type of functions) is a subtype of Object (the type of objects), this isn’t wrong. The type of null is 'object'. This is a bug, but one that can’t be fixed, because it would break existing code. instanceof looks like this: «value» instanceof «Cons
A Study on Solving Callbacks with JavaScript Generators
When I first started writing node.js code, there were 2 things I hated: all the popular templating engines, and the proliferation of callbacks. I was willing to put up with callbacks because I understood the power of event-based servers, but since I saw that generators were coming to JavaScript, I have eagerly awaited the day they were implemented. That day has come. Today, they have landed landed
JavaScript Refresh – How To Reload A Page In JavaScript – typedarray.org
location.reload() The location.reload() method in JavaScript is used to refresh the contents of a window or frame. This can be used to reload a page, update a frame, or simply to refresh the contents of a div. This is useful when the page has changed and you want to make sure that the user is seeing the most up-to-date version. In order to use the reload method, you must first have a reference to
Coding.Cookies - Building a Roguelike in Javascript - Part 1: Introduction
As I've mentioned in the past, I've always enjoyed playing roguelike games such as NetHack, Dungeon Crawl Stone Soup and ADOM. If you've never played these games before I highly encourage you to check them out. The ASCII graphics may not be for everyone but the incredibly deep gameplay more than makes up for it. I've tinkered on a few home-grown roguelikes in the past and it's always proved to be
Handlebars.js Tutorial: Learn Everything About Handlebars.js JavaScript Templating
(A Comprehensive Handlebars.js Tutorial) This is a complete tutorial, and indeed a reference, on Handlebars.js templating and, principally, JavaScript templating. Handlebars.js is a client-side (though it can be used on the server, too) templating engine for JavaScript. It is a JavaScript library that you include in your page just as you include any other JavaScript file. And with it, you can add
Alternate Labs
Hey! I'm Pete, a software developer and founder of Alternate Labs. I love building apps using Ruby, Swift and JavaScript. I have been working with agencies and startups since early 2005, helping to design, build and ship products and services on the web. Previously I have worked at Typecast (aquired by monotype), Crafty Devil (now Flowlens) and PropertyPal (founding team). For several years my foc
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Intro to Web Workers
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GitHub - pablof7z/chardin.js: Simple overlay instructions for your apps.
13 jQuery SelectBox/Drop-down Plugins — SitePoint
GitHub - studiomohawk/javascript-koans at ja-koan-with-grunt
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