How do ES6 functions differ from previous versions?

How do ES6 functions differ from previous versions?

ES6 introduced several new features for functions, such as arrow functions, default parameters, and rest/spread operators. Arrow functions provide a more concise syntax and lexically bind the this value.

Can you explain arrow functions in more detail?

Sure! Arrow functions allow you to write shorter function expressions. They do not have their own this, which means they inherit this from the parent scope. For example: const add = (a, b) => a + b;.

What are default parameters?

Default parameters allow you to initialize function parameters with default values if no value or undefined is passed. For example: function multiply(a, b = 1) { return a * b; }.

What about the rest and spread operators?

The rest operator (...) allows you to represent an indefinite number of arguments as an array. The spread operator is used to expand an iterable into more elements. For example: function sum(...numbers) { return numbers.reduce((acc, num) => acc + num, 0); }.