Is there any problem in writing js inheritance compared to js parasitic combinatorial inheritance?

    function Sup(){
        this.name = "adc";
        this.arr = [1,2,3];
    }

    Sup.prototype.say = function(){
        console.log(this.arr)
    }

    function Sub(){
        Sup.call(this)
    }

    Sub.prototype = Sup.prototype

    var c1 = new Sub()
    var c2 = new Sub()
Javascript
Feb.28,2021
reference question
directly assign Sub.prototype and Sup.prototype to the same memory address
all will interact with each other Sup the prototype method defined in Sub , there will also be
generally: Sub.prototype = Object.create (Sup.prototype)

upstairs the positive solution
problem is very big, and you want to give Sub. It is equivalent to adding a method to the child but modifying the parent's prototype. If you have another Sub1 , then Sub1 will also have the methods you add, which is certainly not what we expected.

Previous: Communicate with the front and back end of websocket, and the back end sends 64-bit binary to the front end. How does the front end change the binary to the long type defined in the back-end service?

Next: React routing problem. The console reported a warning after starting the project.

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
© 2021 CodesHelper
Advertising Contact us About us
Menu