When is it important to pass props to super(), and why? class MyComponent extends React.Component { constructor(props) { super(); // or super(props) ? } } 10 s 10
I have been reading a bunch of React code and I see stuff like this that I don’t understand: handleChange = field => e => { e.preventDefault(); /// Do...
Using ES6 modules, I know I can alias a named import: import { foo as bar } from 'my-module'; And I know I can import a default import: import...
I’m using ArcGIS JSAPI 4.12 and wish to use Spatial Illusions to draw military symbols on a map. When I add milsymbol.js to the script, the console returns error...
Arrow functions in ES2015 provide a more concise syntax. Can I replace all my function declarations / expressions with arrow functions now? What do I have to look out...
As far as I understand, in ES7/ES2016 putting multiple await‘s in code will work similar to chaining .then() with promises, meaning that they will execute one after the other...
When returning an object from an arrow function, it seems that it is necessary to use an extra set of {} and a return keyword because of an ambiguity...
File: SafeString.js // Build out our basic SafeString type function SafeString(string) { this.string = string; } SafeString.prototype.toString = function() { return "" + this.string; }; export default SafeString; I...
It seems to be obvious, but I found myself a bit confused about when to use curly braces for importing a single module in ES6. For example, in the...
In a project I am collaborating on, we have two choices on which module system we can use: Importing modules using require, and exporting using module.exports and exports.foo. Importing...