Custom Error Objects in JavaScript
For an upcoming talk at Mountain West JavaScript I'm going to talk about some basics in error handling. One of the advanced techniques that's a bit more advanced is the idea of creating custom errors objects to pass through your callbacks. Why Error objects? When following the callback pattern it's really nice to be able to depend that your error will return data in a consistent format. Error obje
Naming JavaScript Functions
blog about newsletter Work with me Remember that anonymous function? Probably not. After all, if it wasn’t worth a name, it probably hasn’t been used since. But written one lately? Absolutely. They abound, especially in event handlers: document.addEventListener('DOMContentLoaded', function () { console.log('ready!'); }); And iterators: [1,2,3,4].filter(function (n) { return (n % 2) === 1; }); Most
DailyJS: The Art of Error
Error was originally a character in the hit video game, "Zelda". I like to define a lot of objects that inherit from Error. I find it helps me to track down issues – post-mortem – but also to clearly handle expected errors. Sometimes writing error handling code feels like a chore, but it shouldn’t be an afterthought. Well-designed and well-tested errors will help you maintain projects, but also he
WebStorm+Chromeでウェブサイトコードリーディング
IntelliJさんのChromeプラグインが進化してた – しおしおの雑記帳 を見て気づいた事。 今までは WebStorm -> JavaScriptデバッグ実行 -> Chrome起動 という方向でしか、WebStorm内のデバッガーは使うことが出来なかったのですが、 WebStorm 8 EAPからは、Chrome -> Inspect in WebStorm -> WebStorm という双方向でデバッガーを使えるようになったみたいです。 これを利用して、簡単にWebStormを使ってウェブサイトのコードを読むことができるのでその手順の説明です。 手順は単純で WebStormで適当なプロジェクトを開く(プロジェクトを開いてないと”Inspect in WebStorm”ができない) Chromeで読みたいサイトを開く Chromeのコンテキストメニューから”Inspect in
npmとbrowserifyを使ったクライアントサイドのウェブアプリ開発
YoutubeとVimeoの検索結果のRSSをまとめてOPMLで取得できるサイトを作った | Web scratch で公開した Tech Video RSS Searcher はbrowserifyを使って作ったので、その辺の開発フローについての記事です。 browserify って何? browserify はNode.jsスタイルで書かれたモジュール(CommonJS)を ブラウザで利用できるように変換するコマンドラインツール(Nodeモジュール)となっています。 又、node.jsのCore Modulesのshimが用意されていて、 npmで公開されているnode.js向けのモジュールも一緒に変換してブラウザで動かすことが出来るようになっています。(普通に require で読みこめば勝手に変換されます) 原理的に無理だったり全てのモジュールが動くわけじゃないですが、 その辺の互
Refactoring your JavaScript code with Grasp | Grasp - JavaScript structural search, replace, and refactor
There’s more to programming than just writing code. While unlikely, it is possible to write imperfect code the first time through, or have requirements change over time. In these cases, you have to refactor the code you’ve already written to fix mistakes and change functionality. You can go about refactoring your code in several ways; a small change can be done manually, but a larger change requir
Sean Massa's Labs
Sean's Adventures Sean Massa discusses tech, organizations, ethics, and games. Recent Blog Post See more at /blog. About Sean Massa Sean is a(n): supporter of diversity, equity, and inclusion enthusiast of organizational structures software engineer with nearly two decades of experience spanning .NET, Ruby/Rails, front-end javascript, Node.js, and various databases community organizer of meetups,
Conzole
v0.1.0 by Pierluigi Pesenti Download .zip Download .tar.gz View on GitHub Conzole is a debug panel built in javascript that wraps javascript native console object methods and functionality in a panel displayed inside the page. Include it once and see it the same every time you open up the page, in every browser, on mobile etc. It also adds some unique functions as the “watching” list. It let you w
Tips and Tricks: Ignoring Library Code While Debugging in Chrome
Tips and Tricks: Ignoring library code while debugging in Chrome Firefox has recently released a feature they call "Black Boxing". It's very useful, you can black-box JavaScript source files on a case-by-case basis. When a library is black-boxed the Debugger ignores it. When you're stepping through lines the Debugger will automatically step through lines contained in black-boxed sources. This is g
Ustream.tv: ユーザー nodejsjp: 新しいテスト用ライブラリのご提案 @t_wada, Recorded on 2013/08/21. Web
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Building a Better JavaScript Profiler with WebKit
By Francisco Tolmasky on April 29, 2009 I had the pleasure of showing off some the cool new features we’ve been adding to the WebKit inspector at JSConf last week. It’s no secret that debugging basically sucks in JavaScript, and until recently, it was a little bit worse in Objective-J. Up until now we’ve focused mainly on adding stop gap measures to our own code, but recently we’ve decided to shif
Compiling to JavaScript, and Debugging with Source Maps – Mozilla Hacks - the Web developer blog
Compiling to JavaScript, and Debugging with Source Maps Update 2013/05/29: I have updated the article to reflect recent changes in the source map specification where the //@ syntax for linking a source map to a script has been deprecated in favor of //# due to problems with Internet Explorer. This is a tutorial on how to write a compiler which generates JavaScript as its target language, and maint
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Packaging Generated Code for gRPC Services
スプリットコンソール、ミニファイ済み JS の整形表示など – Firefox 開発ツール エピソード 28
VanillaJS refactoring by cburgmer · Pull Request #739 · tastejs/todomvc
GitHub - DeveloperToolsWG/console-object
GitHub - evanw/node-source-map-support: Adds source map support to node.js (for stack traces)
JavaScript Error Monitoring
GitHub - philipwalton/html-inspector: HTML Inspector is a code quality tool to help you and your team write better markup. It's written in JavaScript and runs in the browser, so testing your HTML has never been easier.
GitHub - dunxrion/console.image
