This week's JavaScript news, issue 287

Wrong ways to use Promises, replacing Lodash with ES6, a free Redux course, and more. Read this e-mail on the Web JavaScript Weekly Issue 287 — June 9, 2016 Promises: All The Wrong Ways Kyle Simpson examines a variety of ways in which JavaScript promises get abused: “Promises are powerful and transformative, but I urge you to take a step back and re-examine how you’re relying on them.” Kyle Simpson 10 Lodash Features You Can Replace with ES6 Lodash is the most depended on npm package, but if you’re using ES6, you might not actually need it. Dan Prince Building React Applications with Idiomatic Redux Free 27 part video course from Redux creator, Dan Abramov. Egghead Automatically Art-Directed Responsive Images With Cloudinary, you can easily adapt any image characteristic at breakpoints to provide an optimal viewing experience on any device. Cloudinary   Sponsored ES Modules and Node.js: Hard Choices Node 6 supports 93% of ES6 but not ES Modules. Some hard decisions are needed to make it work. (Like this? Today’s Node Weekly has more.) Rod Vagg Making Your JavaScript Pure Apply the principles of purely functional languages to your JavaScript to gain more reliable, self-documenting codebases. Jack Franklin nbind: A Way to Combine C++ and JavaScript A set of headers that make a C++11 library accessible from JavaScript by generating the necessary bindings. charto What's The Smallest Subset of Characters To Run Any JS? A mostly pointless, but geeky and fun, look at rendering characters via JavaScript using just a few underlying symbols. Sylvain Pollet-Villard Jobs Front-End Engineer at SalesforceIQGet the best of both worlds, the culture & speed of a startup with the backing of Salesforce. We push code daily, prize unique ideas, & enjoy the moments along the way. JavaScript, HTML, CSS, Angular. SalesforceIQ JavaScript Developer at Sky Betting and GamingWe’re looking for JS Developers with experience and a sense of what works. We create Rich Internet Applications in React with PHP/Node backends. There’s plenty more great tech to play with — come and find out more. Sky Betting and Gaming The Easiest Way to Find a JobHired lets you sit back while job offers come to you. When you complete your profile, instantly apply to 3,500+ companies on the platform who will contact you with job offers, including salary and equity up-front. Try it today. Hired.com In brief Firefox to Help Developers with JavaScript Errors news Error messages in Firefox’s dev console will provide links to associated docs.  Mozilla Hacks JS++: A New Compiler That Tackles JavaScript's Weak Typing news  Paul Krill Get Live 1:1 JavaScript Expert Help / Become a JavaScript Codementor  Codementor helps developers learn JavaScript faster with on-demand live expert help. Are you a JS expert? Become a Codementor and get paid by helping your fellow developers.  Codementor   Sponsored Working with Regular Expressions in JavaScript tutorial If you’re intimidated by or new to regexes, this is a good place to start.  Kevin Yank Angular Directives Mapped to React tutorial How do you do the equivalents of ng-if, ng-repeat, and others, in React?  Dave Ceddia An Introduction to Unit Testing in Node tutorial node  Gergely Nemeth A Detailed Look at JS Variable Hoisting tutorial A key aspect of working with variables in JavaScript.  Dmitri Pavlutin Building Real-time Apps with WebSockets and Server-Sent Events tutorial  Mark Brown An Introduction to Iteration in ES6 with Generator Functions video  Rally Coding '!!' vs hasOwnProperty vs 'in' in 10 Minutes video  Derick Bailey 4 Most Common Errors with React/Redux video  Rally Coding Live Coding a 'Minimum Viable View' Library in 30 Minutes video  Juha Lindstedt When Not to Use ES6 Arrow Functions opinion  Dmitri Pavlutin 7 Surprising Things I Learned Writing a Fibonacci Generator in JavaScript opinion  Eric Elliott Angular Code Review: Checklists for Reviewing Your Angular Code tools  Jurgen Van de Moere Kajero: Interactive JavaScript Notebooks with Graphing Functionality tools  Joel Otter Build faster Node.js apps tools node See how your app spends its time (database, cache, external http requests), where it needs optimizing, and who wrote the slow code.   Opbeat   Sponsored ng2-notifications: Native Web Push Notifications with Angular 2 code  Alex Castillo lodash-bound: Enables Chained Lodash Functions with ES Bind (::) Syntax code  Elad Ossadon is.js: A Simple Yet Extensible Predicate Library code Includes a wide variety of checks for objects.  react-aim: Determine Cursor Aim for Triggering Events with React code  Gabriel Bull Trixly: A Universal TypeScript Starter Kit for Angular 2 and React code Tests using Mocha and Chai, TSLint for code style, transpilation to ES5 by Babel, and more.  KFlash Looking for more on Node? Read this week's Node Weekly too :-) Curated by Peter Cooper and published by Cooper Press. Stop getting JavaScript Weekly : Change email address : Read this issue on the Web © Cooper Press Ltd. Office 30, Lincoln Way, Louth, LN11 0LS, UK

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