js uses delete to implement inheritance sample code

The code copy is as follows:

//Use object impersonation to realize js inheritance

function A(color) {

this.Acolor = color;

this.AshowColor = function() {

document.writeln("Acolor: " + this.Acolor);

}

}

function B(color, name) {

// Assign newMethod to A and call A's constructor

this.newMethod = A;

this.newMethod(color);

//Then delete the reference to A, so that he cannot be called in the future

delete this.newMethod;

this.Bname = name;

this.BshowName = function() {

document.writeln("Bname: " + this.Bname);

}

}

var objA = new A("red");

objA.AshowColor();

document.writeln("------------------------------------------------------------------------------------------------------------------------

var objB = new B("black", "demo");

objB.AshowColor();

objB.BshowName();

document.writeln("------------------------------------------------------------------------------------------------------------------------