JS For Of Loop

JavaScript For of Loop

The for..of statement creates a loop iterating over iterable objects (including Array, Map, Set, Arguments object and so on), invoking a custom iteration hook with statements to be executed for the value of each distinct property.

for (variable of object) {
  statement
}

	Description
variable	On each iteration a value of a different property is assigned to variable.
object	Object whose enumerable properties are iterated.

MDN link | MSDN link | arguments @@iterator

Examples

Array

let arr = [ "fred", "tom", "bob" ];

for (let i of arr) {
    console.log(i);
}

// Output:
// fred
// tom
// bob

Map

var m = new Map();
m.set(1, "black");
m.set(2, "red");

for (var n of m) {
console.log(n);
}

// Output:
// 1,black
// 2,red

Set

var s = new Set();
s.add(1);
s.add("red");

for (var n of s) {
console.log(n);
}

// Output:
// 1
// red

Arguments object

// your browser must support for..of loop
// and let-scoped variables in for loops

function DisplayArgumentsObject()
{
    for (let n of arguments) {
    console.log(n);
    }
}

DisplayArgumentsObject(1,"red");

// Output:
// 1
// red