how to add elements of array in javascript code example

Example 1: javascript append to array

var colors=["red","white"];
colors.push("blue");//append 'blue' to colors

Example 2: how to append object in array javascript

var select =[2,5,8];
var filerdata=[];
for (var i = 0; i < select.length; i++) {
  filerdata.push(this.state.data.find((record) => record.id == select[i]));
}
//I have a data which is object,
//find method return me the filter data which are objects
//now with the push method I can make array of objects

Example 3: add item to array javascript

const arr1 = [1,2,3]
const newValue = 4
const newData = [...arr1, obj] // [1,2,3,4]

Example 4: how to append an element to an array in javascript

//Use push() method
//Syntax: 
array_name.push(element);
//Example: 
let fruits = ["Mango", "Apple"];
//We want to append "Orange" to the array so we will use push() method
fruits.push("Orange"); 
//There we go, we have successfully appended "Orange" to fruits array!