ES2015+ cheatsheet
A quick overview of new JavaScript features in ES2015, ES2016, ES2017, ES2018 and beyond. Let function fn () { let x = 0 if (true) { let x = 1 // only inside this `if` } } Const const a = 1 let is the new var. Constants work just like let, but can’t be reassigned. See: Let and const
JavaScript モジュールã®ç¾çŠ¶ | POSTD
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babelã¸Optional ChainingãŒè¿½åŠ ã•ã‚Œã‚‹ - 技術探ã—
Optional Chaining github.com // before const fooInput = myForm.querySelector('input[name=foo]'); const fooValue = fooInput ? fooInput.value : undefined; // after const fooValue = myForm.querySelector('input[name=foo]')?.value; const obj = { foo: { bar: { baz: 42 } } }; obj?.foo?.bar?.baz; // 42 obj?.qux?.baz; // undefined obj?.foo.bar.qux?.(); // undefined function test() { return 42; } test?.();
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JavaScript Clean Coding Best Practices - RisingStack Engineering
Writing clean code is what you must know and do in order to call yourself a professional developer. There is no reasonable excuse for doing anything less than your best. “Even bad code can function. But if the code isn’t clean, it can bring a development organization to its knees.†— Robert C. Martin (Uncle Bob) In this blog post, we will cover general clean coding principles for naming and using
GitHub - ryanmcdermott/clean-code-javascript: Clean Code concepts adapted for JavaScript
Software engineering principles, from Robert C. Martin's book Clean Code, adapted for JavaScript. This is not a style guide. It's a guide to producing readable, reusable, and refactorable software in JavaScript. Not every principle herein has to be strictly followed, and even fewer will be universally agreed upon. These are guidelines and nothing more, but they are ones codified over many years of
Babelã‚’6ç³»ã«ã‚¢ãƒƒãƒ—デートã—ãŸã‚‰gulpã§ã“ã‘ã‚‹ - Qiita
gulpã®3.9.0ã‹ã‚‰ES6ã§ã‚¿ã‚¹ã‚¯ã‚’記述ã§ãるよã†ã«ãªã£ãŸã®ã§ä½¿ã£ã¦ã„ãŸã‘ã©ã€ Babelã®6ç³»ã«ã‚¢ãƒƒãƒ—デートã—ãŸã‚‰å‹•ã‹ãªããªã£ãŸã€‚ ※ã¼ãƒ¼ã£ã¨ã—ã¦ãŸã‚‰æœ€è¿‘ã„ã‚ã„ã‚アップデートã•ã‚Œã¦ã¦ã„ã‚ã„ã‚å‹•ã‹ãªããªã£ã¦ã„ã‚‹ã®ã§ä¸‹ã®æ–¹ã«è¿½è¨˜(2016/01/26) ç¾è±¡ gulp: 3.9.0 babel-core: 6.0.14 以下ã®ã‚ˆã†ã«gulpコマンドã§defaultタスクを実行ã—よã†ã¨ã—ãŸã¨ã“ã‚ importãªã‚“ã¦ã—らãªã„ï¼ã¨æ€’られる。。 [sawapi: ~/dev/git/sawapi/mw]$ gulp [17:11:48] Requiring external module babel-core/register /home/sawapi/dev/git/sawapi/mw/gulpfile.babel.js:3 import requireDir from 'require-di
ã‚ー付ãコレクション - JavaScript | MDN
Map Map オブジェクト Map オブジェクトã¯ã‚ーã¨å€¤ã®ãƒžãƒƒãƒ—ã§ã€æŒ¿å…¥é †ã«è¦ç´ ã‚’å復処ç†ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ 次ã®ã‚³ãƒ¼ãƒ‰ã§ã¯ Map を用ã„ãŸã„ãã¤ã‹ã®åŸºæœ¬çš„ãªæ“作を表ã—ã¦ã„ã¾ã™ã€‚ã¾ãŸã€è¿½åŠ ã®ä¾‹ã‚„å…¨ã¦ã® API ã«ã¤ã„ã¦ã¯ã€ Map リファレンスページをã”覧ãã ã•ã„。 for...of ループを使ã£ã¦ã€å„å復処ç†ã«ãŠã„㦠[key, value] ã‹ã‚‰ãªã‚‹é…列を返ã—ã¦ã„ã¾ã™ã€‚ const sayings = new Map(); sayings.set("dog", "woof"); sayings.set("cat", "meow"); sayings.set("elephant", "toot"); sayings.size; // 3 sayings.get("dog"); // woof sayings.get("fox"); // undefined sayings.has
Portada - Universo Subaru
Vive la montaña y la aventura con Subaru. Cuando el invierno cubre las cumbres y los caminos se vuelven desafiantes, solo los más valientes responden a la llamada de la montaña. El documental ‘Art20’ nos +
CSS Modules
If you wanted to identify an inflection point in the recent development of CSS thinking, you’d probably pick Christopher Chedeau’s “CSS in JS†talk from NationJS in November, 2014. It was a watershed moment that set a bunch of different minds spiralling off in their own directions like particles after a high-energy collision. For instance, React Style, jsxstyle and Radium are three of the newest,
Sort and Filter a Table Using Angular | DigitalOcean
Introduction When building Angular applications, one of the cornerstones we will use is ng-repeat. Showing data is something that we do in applications like when we show a table of users or whatever other data we need to show our users. Today we’ll be looking at a way to sort and filter our tabular data. This is a common feature that is always useful so let’s look at what we’ll be building and div
JavaScript language overview - JavaScript | MDN
JavaScript is a multi-paradigm, dynamic language with types and operators, standard built-in objects, and methods. Its syntax is based on the Java and C languages — many structures from those languages apply to JavaScript as well. JavaScript supports object-oriented programming with object prototypes and classes. It also supports functional programming since functions are first-class objects that
Best JavaScript Debugging Tools | Learning jQuery
Tips, techniques, and tutorials for the jQuery JavaScript library Debugging JavaScript code can be real pain in ass as finding errors in bunch of code is quite time consuming and arduous task for developers. In this article we have gathered some of the Best JavaScript Debugging Tools that will turn out to be handy while debugging millions of JavaScript code without much hassle and help you to achi
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Introduction to localStorage and sessionStorage | DigitalOcean
To promise or to callback? That is the question...
https://moroccojs.org/tutorials/npm-based-front-end-workflow/
A small & beautiful WYSIWYG editor for HTML content
Performance is User Experience | Designing for Performance
SLOBSERVER - L'actualité de Second Life
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