How to usefor…of loop in Javascript
The for…of loop iterates over the iterable objects (like Array, Map, Set, arguments object, …, etc), invoking a custom iteration hook with statements to be executed for the value of each distinct property.
Syntax:
for ( variable of iterableObjectName) {
...
}
Example: In this example, we are using for…of the loop to iterate over the map object.
let newMap = new Map()
newMap.set("Cricket", "sport");
newMap.set("Apple", "fruit");
for (let [key, value] of newMap) {
console.log(key + " is " + value);
}
Output
Cricket is sport Apple is fruit
How to iterate over Map elements in JavaScript ?
Map() is very useful in JavaScript it organises elements into key-value pairs. This method iterates over each element in an array and applies a callback function to it, allowing for modifications before returning the updated array.”
The Map() keyword is used to generate the object. The map() method loops through each object in the given array. The map() method combines with the entries() method to loop through the object and returns an array containing key-value pairs as its data.
Here we have two methods to iterate Map element in JavaScript:
Table of Content
- Using for…of loop
- Using forEach() loop
- Using Map.keys() method