add a new element to an array javascript code example

Example 1: javascript append to array

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

Example 2: javascript append element to array

var colors= ["red","blue"];
	colors.push("yellow");

Example 3: javscript append item from array

let foo = ['oop','plop','copo'];
	foo.push("plop");

Example 4: 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