Question

How to create subclasses of Array in JavaScript ES6

Answer 1

class CTest extends Array {
    get top() {
        return this[this.length - 1];
    }
}

var obj = new CTest();

obj.push('javascript');
obj.push('c++');
obj.push('node.js');

console.log(obj.top); 
console.log(obj.length); 
console.log(obj); 


 
/*
run:
      
node.js
3
CTest(3) [ 'javascript', 'c++', 'node.js' ]
 
*/

 

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