sample028.html

﻿<!DOCTYPE html><html lang="en"><body><script>

    // this can be done with any of the native constructors that actual produce an object
    var myString = new String();
    var myNumber = new Number();
    var myBoolean = new Boolean(true);
    var myObject = new Object();
    var myArray = new Array();
    var myFunction = new Function('return 2+2');
    var myRegExp = new RegExp('\bt[a-z]+\b');

    myString.prop = 'test';
    myNumber.prop = 'test';
    myBoolean.prop = 'test';
    myObject.prop = 'test';
    myArray.prop = 'test';
    myFunction.prop = 'test';
    myRegExp.prop = 'test';

    // logs 'test', 'test', 'test', 'test', 'test', 'test', 'test'
    console.log(myString.prop, myNumber.prop, myBoolean.prop, myObject.prop, myArray.prop, myFunction.prop, myRegExp.prop);

    // be aware: instance properties do not work with primitive/literal values
    var myString = 'string';
    var myNumber = 1;
    var myBoolean = true;

    myString.prop = true;
    myNumber.prop = true;
    myBoolean.prop = true;

    // logs undefined, undefined, undefined
    console.log(myString.prop, myNumber.prop, myBoolean.prop);

</script></body></html>