What are arrow functions and closures in JavaScript ES6?

What are arrow functions in JavaScript ES6?

Arrow functions are a concise way to write function expressions in JavaScript. They use the => syntax and do not have their own this context.

Can you give me an example of an arrow function?

Sure! Here's a simple example:

const add = (a, b) => a + b;
console.log(add(2, 3)); // Outputs: 5

What are closures in JavaScript?

Closures are functions that remember their outer variables even when the function is executed outside its original scope.

Can you show me an example of a closure?

Absolutely! Here's an example:

function outerFunction() {
    let outerVariable = 'I am outside!';
    return function innerFunction() {
        console.log(outerVariable);
    };
}
const innerFunc = outerFunction();
innerFunc(); // Outputs: I am outside!