I am new to Javascript. I have defined an object using object initializer method.
var obj = { a : "A";
b : "B";
myFunc = function() {
alert("Hello"):
}
Now I want to create another object that will be child of Obj. How can I do that.
var obj1 = new obj();
is not working.
First off, you have a syntax error with
myFunc = function() { ...
Anyway, this is how you'll want to set it up
function Foo() {
this.a = "A";
this.b = "B";
}
Foo.prototype.myFunc = function() {
alert("hello");
};
Now to create your child object
function Bar() {
Foo.call(this); // call parent constructor; optional
}
// setup child prototype
Bar.prototype = Object.create(Foo.prototype);
Bar.prototype.constructor = Bar;
Check it out
var b = new Bar();
b instanceof Bar; // true
b instanceof Foo; // true
b.constructor.name; // Bar
b.myFunc; // "hello"
To do it the way you wanted to:
var obj = {
a: "A",
b: "B",
myFunc: function () {
alert("Hello");
}
};
var obj1 = Object.create(obj)
obj1.a = 2;
console.log(obj1);
console.log(obj);
var obj1 = Object.create(obj);