javascript JS -OOP方式 - SO + DJPW.cz

Posted 2021-05-04

// define the objects:
var objLit = {
  x: 0,
  y: 0,
  z: 0,
  add: function () {
    return this.x + this.y + this.z;
  }
};

var ObjCon = function(_x, _y, _z) {
  var x = _x; // private
  var y = _y; // private
  this.z = _z; // public
  this.add = function () {
    return x + y + this.z; // note x, y doesn't need this.
  };
};

// use the objects:
objLit.x = 3; 
objLit.y = 2; 
objLit.z = 1; 
console.log(objLit.add());    

var objConIntance = new ObjCon(5,4,3); // instantiate an objCon
console.log(objConIntance.add());
console.log((new ObjCon(7,8,9)).add()); // another instance of objCon
console.log(objConIntance.add()); // same result, not affected by previous line

//fake instance for literal object :)-


var myExplorer = function(settings) {

  var o = {
    init: function() {
      this.somevalue = settings;
    },

    whatever: function() {
    }
  };

  o.init();

  return o;
};

var exp1 = myExplorer('something');
var exp2 = myExplorer('anything');

console.log(exp1.somevalue); //something
console.log(exp2.somevalue); //anything

var myExplorer = function() {
    var init = function(settings) {
        var config = {
            $wrapper : $('#explorerCategories'),
            $contentHolder : $j('#categoryContent'),
            loadingImg : '<img src="../images/standard/misc/ajax_loader.gif" alt="loading" class="loading" />'
        }
        // provide for custom configuration via init()
        if (settings && typeof(settings) == 'object') {
            $.extend(config, settings);
        }

        // some more code...
    },

    var createExpanderLink = function() {
        // more code
    },

    var anotherMethod = function() {
        // etc
    }

    // Public API 
    // return the functions you want to use outside of the current instance
    return {
        init : init,
        createExpanderLink : createExpanderLink,
        anotherMethod : anotherMethod
    }
}
var firstExplorer = new myExplorer();
var secondExplorer = new myExplorer();
// etc 

        var Test = (function () {
        function _insert() {
            console.log(this);
            $("#a").html(this.text);
        }
        
        function Test() {
            this.text = 'Pokusný text';
        }
        
        Test.prototype.run = function () {
            _insert.call(this);
        };
        
        return Test;
        })();


        $(document).ready(function(){

            var x = new Test();
            x.run();

        });

//@see: https://stackoverflow.com/questions/2709612/using-object-create-instead-of-new

// standard way 
var UserA = function(nameParam) {
    this.id = MY_GLOBAL.nextId();
    this.name = nameParam;
}
UserA.prototype.sayHello = function() {
    console.log('Hello '+ this.name);
}
var bob = new UserA('bob');
bob.sayHello();


// with new E5 Object.create()  


var userB = {
    init: function(nameParam) {
        this.id = MY_GLOBAL.nextId();
        this.name = nameParam;
    },
    sayHello: function() {
        console.log('Hello '+ this.name);
    }
};
var bob = Object.create(userB);
bob.init('Bob');
bob.sayHello();