You’ve Got Options for Removing Event Listeners
You’ve Got Options for Removing Event Listeners Reviewing some of the most common approaches available to remove event listeners in JavaScript. Cleaning up your code in runtime is a non-negotiable part of building efficient, predictable applications. One of the ways that’s done in JavaScript is by stewarding event listeners well — specifically, removing them when they’re no longer needed. There ar
Uppy
The all you need Dashboard — powerful, responsive, and pluggable.Add files from remote sources, edit images, generate thumbnails, and more. import Uppy from '@uppy/core' import Dashboard from '@uppy/dashboard' import RemoteSources from '@uppy/google-drive' import ImageEditor from '@uppy/image-editor' import Webcam from '@uppy/webcam' import Tus from '@uppy/tus' const uppy = new Uppy() .use(Dashboa
vue-cli 3.0で立ち上げたアプリに複数のエントリーポイントを用意する - Qiita
概要 エントリーポイントを分けることで、コードの見通しは良くなり、余分なコードのダウンロードを避けることができます。 今回、vue-cli 3.0 で立ち上げた趣味アプリに複数のエントリーポイントを用意したのですが、 思いの外苦戦したので設定方法を共有したいと思います。 設定方法 vue-cli の2系までは webpack.config に entry を記述することで、複数のエントリーポイントに対応する事ができました。1 しかし、vue-cli 3.0でセットアップしたプロジェクトには webpack.config が生成されません。 その代わりに vue.config.jsに vue-cli の設定を記述することができます。2 この中で pages オブジェクトとして、複数のエントリーポイントを定義することができます。 この状態を multi-page mode と呼びます。 vue
React.Componentで外部要素のevent bind,unbindを正しく行う - kubell Creator's Note
正しくevent unbindできてますか？@kyo_agoです。 React.Componentの紹介を行っている記事でComponentの外にある要素のevent bind,unbindを正しく行えていない例がいくつかあったので記事にしてみました。 ここではwindow.onresizeに合わせてstateを変えるReact.Componentを例に紹介したいと思います。 正しくevent bind,unbindを行う 先に書いてしまいますが、eventのbind,unbindは以下のように行います。 class HogeComponent extends React.Component { constructor() { super(); this.state = {height: 0}; } componentDidMount() { // 先にbindしてから使う this.ev
Cheat sheet for moving from jQuery to vanilla JavaScript
jQuery is still a useful and pragmatic library, but chances are increasingly that you’re not dependent on using it in your projects to accomplish basic tasks like selecting elements, styling them, animating them, and fetching data—things that jQuery was great at. With broad browser support of ES6 (over 96% at the time of writing), now is probably a good time to move away from jQuery. I recently re
All the New ES2019 Tips and Tricks | CSS-Tricks
Get affordable and hassle-free WordPress hosting plans with Cloudways — start your free trial today. The ECMAScript standard has been updated yet again with the addition of new features in ES2019. Now officially available in node, Chrome, Firefox, and Safari you can also use Babel to compile these features to a different version of JavaScript if you need to support an older browser. Let’s look at
KV Storage - the Web's First Built-in Module | Blog | Chrome for Developers
Browser vendors and web performance experts have been saying for the better part of the last decade that localStorage is slow, and web developers should stop using it. To be fair, the people saying this are not wrong. localStorage is a synchronous API that blocks the main thread, and any time you access it you potentially prevent your page from being interactive. The problem is the localStorage AP
New JavaScript Features That Will Change How You Write Regex — Smashing Magazine
Regular expressions have been part of the JavaScript language since the third edition of the ECMAScript standard, which was introduced in 1999. ECMAScript 2018 (or ES2018 for short) is the ninth edition of the standard and further improves the text processing capability of JavaScript. If you have ever done any sort of sophisticated text processing and manipulation in JavaScript, you’ll appreciate
Updating a CSS Variable with JavaScript | CSS-Tricks
Get affordable and hassle-free WordPress hosting plans with Cloudways — start your free trial today. Here’s a CSS variable (formally called a “CSS custom property“): :root { --mouse-x: 0px; --mouse-y: 0px; } Perhaps you use them to set a position: .mover { left: var(--mouse-x); top: var(--mouse-y); } To update those values from JavaScript, you’d: let root = document.documentElement; root.addEventL
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