object properties js code example

Example 1: javascript list object properties

var person={"first_name":"Bill","last_name":"Jenner"}
//get the person object properties with:
var keys = Object.keys(person); //keys = ["first_name","last_name"]

Example 2: how to create object js

function person(fname, lname, age, eyecolor){
  this.firstname = fname;
  this.lastname = lname;
  this.age = age;
  this.eyecolor = eyecolor;
}

myFather = new person("John", "Doe", 50, "blue");
document.write(myFather.firstname + " is " + myFather.age + " years old.");

Example 3: object literal javascript

// Object literals are defined using the following syntax rules:
// A colon separates property name from value.
// A comma separates each name-value pair from the next.
// There should be no comma after the last name-value pair.

// If any of the syntax rules are broken, such as a missing comma or colon or curly brace,
// an error will be thrown.

var myObject = {
    sProp: 'some string value',
    numProp: 2,
    bProp: false
};