Object-Oriented JavaScript - Third Edition by Ved Antani & Stoyan Stefanov

Author:Ved Antani & Stoyan Stefanov
Language: eng
Format: mobi
Publisher: Packt Publishing
Published: 2017-01-11T23:00:00+00:00

Let's test this by creating three objects-shape, twoDee, and a third, unnamed object. Then, creating a triangle object means calling multi() and passing all three objects:

var shape = {

name: 'Shape',

toString: function () {

return this.name;

}

};

var twoDee = {

name: '2D shape',

dimensions: 2

};

var triangle = multi(shape, twoDee, {

name: 'Triangle',

getArea: function () {

return this.side * this.height / 2;

},

side: 5,

height: 10

});

Does this work? Let's see. The getArea() method should be an own property, dimensions should come from twoDee, and toString() should come from shape:

>triangle.getArea();

25

>triangle.dimensions;

2

>triangle.toString();

"Triangle"

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