I can mark a JavaScript function as "async" (i.e., returning a promise) with the async keyword. Like this: async function foo() { // Do something } What is the equivalent syntax for arrow ...

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 in the grammar. That means I can’t write p => {...

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 for? Examples: Constructor ...

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 something here }

I know that the >= operator means more than or equal to, but I've seen => in some source code. What's the meaning of that operator? Here's the code: promiseTargetFile(fpParams, aSkipPrompt, ...

With () => {} and function () {} we are getting two very similar ways to write functions in ES6. In other languages lambda functions often distinguish themselves by being anonymous, but in ...

That is, how do I express function *(next) {} with arrow syntax? I've tried all the combinations I could think of, and I can't find any documentation on it. (I am currently using Node.js v0.11.14.)

I have a function that I am trying to convert to the new arrow syntax in ES6. It is a named function: function sayHello(name) { console.log(name + ' says hello'); } Is there a way to give it a ...

I'm new to using ES6 classes with React, previously I've been binding my methods to the current object (show in first example), but does ES6 allow me to permanently bind a class function to a class ...

Why does this work in a Node.js console (tested in 4.1.1 and 5.3.0), but doesn't work in the browser (tested in Chrome)? This code block should create and invoke an anonymous function that logs Ok. () ...

The new ES6 arrow functions say return is implicit under some circumstances: The expression is also the implicit return value of that function. In what cases do I need to use return with ES6 arrow ...

I'm running lint with my React app, and I receive this error: error JSX props should not use arrow functions react/jsx-no-bind And this is where I'm running the arrow function (inside ...

I came across this construct in an Angular example and I wonder why this is chosen: _ => console.log('Not using any parameters'); I understand that the variable _ means don't care/not used but ...

The export statement below gives a syntax error export default const hello = () => console.log("say hello") why ? I'm only able to export named functions export function hello() { console.log(...

Using ES6 arrow functions with lexical this binding is great. However, I ran into an issue a moment ago using it with a typical jQuery click binding: class Game { foo() { self = this; this....