What does three dots mean in typescript

When we see three dots (…) in the code, it’s either rest parameters or the spread operator . There’s an easy way to distinguish between them: When three dots (…) is at the end of function parameters, it’s “rest parameters” and gathers the rest of the list of arguments into an array.

In this usage, the three dots are also called spread operator . As the name implies, we can unpack items of a JavaScript iterable (string, array, object and so on) with it.

The three dots are known as the spread operator from Typescript (also from ES7). The spread operator return all elements of an array. Like you would write each element separately: let myArr = [1, 2, 3]; return [1, 2, 3]; //is the same as: return […myArr];

The three dots are known as the spread operator from Typescript (also from ES7). The spread operator return all elements of an array. Like you would write each element separately: let myArr = [1, 2, 3]; return [1, 2, 3]; //is the same as: return […myArr];

When we see three dots (…) in the code, it’s either rest parameters or the spread operator . There’s an easy way to distinguish between them: When three dots (…) is at the end of function parameters, it’s “rest parameters” and gathers the rest of the list of arguments into an array.

The three dots in JavaScript are the spread / rest operator . The spread syntax allows an expression to be expanded in places where multiple arguments are expected. The rest parameter syntax is used for functions with a variable number of arguments. The spread / rest operator for arrays was introduced in ES6 .