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JS Tutorial

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JS Versions

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JS Forms

JS Forms Forms API

JS Objects

Object Definitions Object Properties Object Methods Object Display Object Accessors Object Constructors Object Prototypes Object ECMAScript 5

JS Functions

Function Definitions Function Parameters Function Invocation Function Call Function Apply Function Closures

JS Classes

Class Intro Class Inheritance Class Static

JS Async

JS Callbacks JS Asynchronous JS Promises JS Async/Await

JS HTML DOM

DOM Intro DOM Methods DOM Document DOM Elements DOM HTML DOM CSS DOM Animations DOM Events DOM Event Listener DOM Navigation DOM Nodes DOM Collections DOM Node Lists

JS Browser BOM

JS Window JS Screen JS Location JS History JS Navigator JS Popup Alert JS Timing JS Cookies

JS AJAX

AJAX Intro AJAX XMLHttp AJAX Request AJAX Response AJAX XML File AJAX PHP AJAX ASP AJAX Database AJAX Applications AJAX Examples

JS JSON

JSON Intro JSON Syntax JSON vs XML JSON Data Types JSON Parse JSON Stringify JSON Objects JSON Arrays JSON PHP JSON HTML JSON JSONP

JS Web APIs

Web API Intro Web History API Web Storage API Web Worker API Web Fetch API Web Geolocation API

JS vs jQuery

jQuery Selectors jQuery HTML jQuery CSS jQuery DOM

JS Examples

JS Examples JS HTML DOM JS HTML Input JS HTML Objects JS HTML Events JS Browser JS Editor JS Exercises JS Quiz JS Certificate

JS References

JavaScript Objects HTML DOM Objects


JavaScript For Of

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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
Okt 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.


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