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.
