The forEach() method is an array method which is used to execute a function on each item in an array. We can use it with the JavaScript data types like Arrays, Maps, Sets, etc. It is a useful method for displaying elements in an array.
We can declare the forEach() method as below.
array.forEach(callback[, thisObject]);
The forEach() method executes the provided callback once for each element present in the array in ascending order.
1. callback: It is a function used to test for each element. The callback function accepts three arguments, which are given below.
2. thisObject: It is an object to use as this when executing the callback.
It will return the created array.
let apps = ['WhatsApp', 'Instagram', 'Facebook'];
let playStore = [];
apps.forEach(function(item){
playStore.push(item)
});
console.log(playStore);The corresponding JavaScript code is:
var apps = ['WhatsApp', 'Instagram', 'Facebook'];
var playStore = [];
apps.forEach(function (item) {
playStore.push(item);
});
console.log(playStore);
var num = [5, 10, 15];
num.forEach(function (value) {
console.log(value);
});
The following are the disadvantages of the use of the forEach() method:
