What is the compatibility of rest and spread in JavaScript?

Can you explain the compatibility of rest and spread operators in JavaScript?

Sure! The rest operator allows you to represent an indefinite number of arguments as an array, while the spread operator expands an array into individual elements. Both are widely supported in modern JavaScript.

Are there any specific versions of JavaScript where these operators are not supported?

Yes, the rest and spread operators are not supported in older versions of JavaScript, specifically before ES6 (ECMAScript 2015). Most modern browsers and environments support them now.

Can you give me an example of how to use both operators?

Absolutely! For the rest operator, you can use it in a function like this: function myFunc(...args) { console.log(args); }. For the spread operator, you can use it to combine arrays: const arr1 = [1, 2]; const arr2 = [3, 4]; const combined = [...arr1, ...arr2];.

What are some common use cases for these operators?

Common use cases include function argument handling with the rest operator and array manipulation or merging with the spread operator.