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JS Tutorial

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JS Objects

Object Definitions Object Prototypes Object Methods Object Properties Object Get / Set Object Protection

JS Functions

Function Definitions Function Parameters Function Invocation Function Call Function Apply Function Bind 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 Forms DOM CSS DOM Animations DOM Events DOM Event Listener DOM Navigation DOM Nodes DOM Collections DOM Node Lists

JS Browser BOM

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JS Web APIs

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JS AJAX

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JS JSON

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JS vs jQuery

jQuery Selectors jQuery HTML jQuery CSS jQuery DOM

JS Graphics

JS Graphics JS Canvas JS Plotly JS Chart.js JS Google Chart JS D3.js

JS Examples

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JS References

JavaScript Objects HTML DOM Objects


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 (ES6)

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

const cars = ["BMW", "Volvo", "Mini"];

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

Looping over a String

Example

let language = "JavaScript";

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

The While Loop

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


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