I got this working by reinstalling the build-angular package. Note the ‘–save-dev’ flag on the install command: npm uninstall @angular-devkit/build-angular npm install –save-dev @angular-devkit/build-angular
super() will call the constructor of its parent class. This is required when you need to access some variables from the parent class. In React, when you call super with props, React will make props available across the component through this.props. See example 2 below without super() class A { constructor() { this.a=”hello” } } … Read more
you should bind the function to this as the ESLint error says “Expected ‘this’ to be used by class method ‘getUrlParams’ getUrlParams = (queryString) => { …. } as you are not using getUrlParams during render (like onClick()) so the above technique is good which we can call it “usage of arrow function in class … Read more
ES6 modules are subject to same-origin policy. You need to run your script from a local server, opening the file directly with a browser will not work. see here ES6 module support in Chrome 62/Chrome Canary 64, does not work locally, CORS error
The for..of loop only supports iterable objects like arrays, not objects. To iterate over the values of an object, use: for (var key in test) { var item = test[key]; }
You make “public static field” using accessor and a “static” keyword: class Agent { static get CIRCLE() { return 1; } static get SQUARE() { return 2; } } Agent.CIRCLE; // 1 Looking at a spec, 14.5 — Class Definitions — you’d see something suspiciously relevant 🙂 ClassElement[Yield] : MethodDefinition[?Yield] static MethodDefinition[?Yield] ; So from … Read more
This is insane. Almost every single answer here suggest running a function runtime in order to well-format, buildtime bad-formatted text oO Am I the only one shocked by that fact, especially performance impact ??? As stated by @dandavis, the official solution, (which btw is also the historic solution for unix shell scripts), is to escape … Read more
Can I do async constructor() No, that’s a syntax error – just like constructor* (). A constructor is a method that doesn’t return anything (no promise, no generator), it only initialises the instance. And, if not how should a constructor work that does this Such a constructor should not exist at all, see Is it … Read more
var f = {a, b, c}; It came with ES6 (ECMAScript 2015) and means exactly the same as: var f = {a: a, b: b, c: c}; It is called Object Literal Property Value Shorthands (or simply property value shorthand, shorthand properties). You can also combine shorthands with classical initialization: var f = {a: 1, … Read more
No, there’s no wildcard export (except when you’re re-exporting everything from another module, but that’s not what you’re asking about). Simply put export in front of each function declaration you want exported, e.g. export function foo() { // … } export function bar() { // … } …or of course, if you’re using function expressions: … Read more