instance of object javascript code example

Example 1: js class check if new instance

new Date() instanceof Date;  // => true

Example 2: new instance of object javascript

function Car(make, model, year) {
  this.make = make;
  this.model = model;
  this.year = year;
}

var car1 = new Car('Eagle', 'Talon TSi', 1993);

console.log(car1.make);
// expected output: "Eagle"

Example 3: if property is same group javscript

var xobj = [
    { role:"Organize Admin", role_id:"id1", permission_name:"View All Users",active: "true" },
    { role:"Organize Admin", role_id:"id1", permission_name:"Create users", active: "true" },
    { role:"Organize Admin", role_id:"id1", permission_name:"Edit users", active: "true" },
    { role:"System Admin", role_id:"id2", permission_name:"Edit users", active: "true" },
    { role:"System Admin", role_id:"id2", permission_name:"Edit users", active: "true" },
];
var groups = {};
xobj.forEach(obj => {	
    if(!groups.hasOwnProperty(obj.role_id)){
        groups[obj.role_id] = [];
    }
    groups[obj.role_id].push(obj);
})
console.log(groups)