A rather geeky/technical weblog, est. 2001, by Bramus
👋 This post also got published on Medium. If you like it, please give it some love a clap over there. At the latest TC39 meeting the new features that will make it into the “ECMAScript® 2018 Language Specification” (ES2018) have been selected. All proposals that have reached stage-4 since the consolidation of ES2017 got …
Continue reading “JavaScript: What’s new in ECMAScript 2018 (ES2018)?”
Say you have a JavaScript object like this: const user = { firstName: ‘Bramus’, lastName: ‘Van Damme’, twitter: ‘bramus’, city: ‘Vinkt’, email: ‘bramus@bram.us’, }; And now say you want to create a copy of the whole object, containing all properties except for the email property. # The oldskool way: The first idea that came to …
Continue reading “JavaScript: Remove a property from an object immutably by destructuring it”
UPDATE February 2018: The proposed operator got renamed from “Null Propagation Operator” to “Optional Chaining Operator”. This post has been updated to reflect this name-change. UPDATE December 2019: This feature has now advanced to Stage-4 and will be part of the ES2020 Specification! 🎉 Earlier today I was delighted to see that the “Optional Chaining …
Continue reading “ESNext: JavaScript “Optional Chaining Operator””
Say you have an object like this: const obj = { firstName: ‘John’, lastName: ‘Doe’, age: 50, eyeColor: ‘blue’ }; Using lodash’s forEach you can easily loop over this object, with easy access to both the key and the value: _.forEach(obj, function(value, key) { console.log(key + ‘ ‘ + value); }); But what about ES2015? …
Continue reading “ES6 ES2015: Looping over an Object with keys and values”
(That’s a presentation embedded above. Use your left/right arrow keys to navigate through it. You might need to click it first in order to focus it.) Whilst we, JavaScript developers, are nowadays spoiled with tools, frameworks, build systems, etc. we might tend to forget some of the core things contained in the JavaScript language. Think …
Continue reading “JavaScript Roots: Core Language Essentials”