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JavaScript For Of


The For/Of Loop

The JavaScript for/of statement loops through the values of an iterable object.

It lets you loop over iterable data structures such as Arrays, Strings, Maps, NodeLists, and more:

Syntax

for (variable of iterable) {
  // code block to be executed
}

variable - For every iteration the value of the next property is assigned to the variable. Variable can be declared with const, let, or var.

iterable - An object that has iterable properties.


Browser Support

For/of was added to JavaScript in 2015 (ECMAScript 2015)

Safari 7 was the first browser to support for/of:

Chrome 38 Edge 12 Firefox 51 Safari 7 Opera 25
Oct 2014 Jul 2015 Oct 2016 Oct 2013 Oct 2014

For/of is not supported in Internet Explorer.


Looping over an Array

Example

let cars = ["BMW", "Volvo", "Mini"];
let text = "";

for (let x of cars) {
  text += x + "<br>";
}
Try it Yourself »

Looping over a String

Example

let language = "JavaScript";
let text = "";

for (let x of language) {
text += x + "<br>";
}
Try it Yourself »


The While Loop

The while loop and the do/while loop are explained in the next chapter.