add index.html template for viewport example

Sascha Schulz

2023-08-30 e3cc1968371467dfa5d61795bfe84eeaff0bc1e4

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function Shape() { 
} 
 
Shape.prototype.getType = function() { 
    return "Shape"; 
} 
 
function Rectangle(a, b) { 
    this.a = a; 
    this.b = b; 
} 
 
Rectangle.prototype = Object.create(Shape.prototype); 
Rectangle.prototype.constructor = Rectangle; 
 
const r = new Rectangle(2, 3); 
 
console.log(r.getType()); 
 
Rectangle.prototype.getType = function() { 
    return "Rectangle"; 
} 
 
console.log(r.getType());