Inside Frontend #2 の発表資料です https://inside-frontend.com
What is Polyfill.io? It's a service which accepts a request for a set of browser features and returns only the polyfills that are needed by the requesting browser. Why do I need it? There are lots of differing browsers and browser versions in use throughout the world, each one has a slightly different set of features to the rest. This can make developing for browsers a difficult task. The latest v
(Updated on: 21.11.2021) This guide is intended to catch you up with the most important reasoning, terms, tools, and approaches to JavaScript testing for the year 2022. It combines information from the best articles recently released (they are referenced at the bottom) and adds from my own experience. It’s a little long but whoever reads and understands this guide, can safely assume they know the
ご来店ありがとうございます。 本日より、『プロフェッショナルSSL/TLS』(2017年3月発行)からスピンオフしたミニブック『OpenSSLクックブック』の提供を開始しました。購入ページからカートに追加していただくことで、どなたでも無償でダウンロードが可能です(クレジットカード情報は不要ですが、直販サイトの購入フローを経由する関係で、お名前の欄と住所の欄への入力はお願いいたします)。 同書は『プロフェッショナルSSL/TLS』の原書である‟Bulletproof SSL and TLS”からOpenSSLに関する章を抜き出して再編された‟OpenSSL Cookbook”の翻訳に相当し、『プロフェッショナルSSL/TLS』の「第11章 OpenSSL」と「第12章 OpenSSLによるテスト」加え、SSL Labsで公開されている ‟SSL/TLS Deployment Best Pra
“OK, but no”If you ever worked with an AJAX call, you are probably familiar with the following error displayed in browser console: Failed to load https://example.com/: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘https://anfo.pl' is therefore not allowed access. If an opaque response serves your needs, set the request’s mode to ‘no-cors’ to fetch the resour
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Introduction The event bus / publish-subscribe pattern is a way of getting unrelated sections of your application to talk to each other. The event system used in Vue components can be used in an event bus / publish-subscribe pattern. Note: This tutorial is specific for Vue 2. In Vue 3, $on, $off, and $once have been removed. External libraries that provide this functionality are recommended. In th
Let’s start with a myth about HTTP/2: With HTTP/2 you don’t need to bundle your modules anymore. HTTP/2 can multiplex all your modules over the same connection in parallel. So there are no additional round trips for the many requests. Each module can be separately cached. Sadly it’s not that easy in reality. Prior workYou can read the following articles, which explain everything in detail and do s
In keeping with the latest trend for this website, I haven’t been writing much content for it. As usual, though, I’ve been writing for other blogs on a variety of topics, most of which are connected to Vue in some way, but there are some that have nothing to do with Vue. Take a look below. Unit Testing Vue ComponentsUnit Testing Vue Components is a pretty self-explanatory title for this article. I
At first glance, null and undefined may seem the same, but they are far from it. This article will explore the differences and similarities between null and undefined in JavaScript. What is null?There are two features of null you should understand: null is an empty or non-existent value.null must be assigned.Here’s an example. We assign the value of null to a: let a = null;console.log(a); // nullW
The build tools of yore: a Loom with Jacquard machine attached webpack is a brilliant tool for bundling frontend assets. When things start to slow down, though, its batteries-included nature and the ocean of third-party tooling can make it difficult to optimize. Poor performance is the norm and not the exception. But it doesn’t have to be that way, and so — after many hours of research, trial, and
A few days ago in a move foreshadowed by a hint at Amazons’ re:Invent conference late last year, AWS released support for Go on its Lambda platform. Go users can now build programs with typed structs representing Lambda event sources and common responses in the aws-lambda-go SDK. These can then be compiled, bundled up into a “Lambda deployment package” (as simple as a ZIP file with a binary in it)
つくる、あそぶ、わかる。2018年4月20日(金)発売、Nintendo Switch『Nintendo Labo』の公式サイトです。
In the past, one of webpack’s trade-offs when bundling was that each module in your bundle would be wrapped in individual function closures. These wrapper functions made it slower for your JavaScript to execute in the browser. In comparison, tools like Closure Compiler and RollupJS ‘hoist’ or concatenate the scope of all your modules into one closure and allow for your code to have a faster execut
C# 5.0で非同期メソッドが導入されてから、 正式リリースを基準にしても5年以上、 最初の発表からだと7年以上経っています。 で、5年経っても、「なんて読むの」「asyncのaとawaitのaは違う」などなどが「定番ネタ」として定期的に出てくるわけですが。 特に、ECMAScript 2017がasync/awaitを導入したり、 Unity 2017がやっとC#のバージョンを6.0に上げれる感じになってきたり、 5年の断絶を経て去年からasync/awaitに触れる人が増えているようです。 5年も離れたら、世代断絶も起こりますよね… そりゃ、「定番ネタ」が改めて増えもしますよね… ということで、5年くらい前に同じようなことをどこかで書いてるはずなんですけど、改めて。 英単語 えいしんく まず読み方。 async: エイシンク await : アウェイト ってやつ。async の方が「ア
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