object oriented javascript interview questions

error, we can see that the above method for global variables did not establish a namespace, global variables for us to pose a danger. So the above wording is right, let's verify: Copy Code code as follows: var box = { Width:2, Height:2, Getarea:function () { The access to the object in return This.width*this.height;//js must be displayed, that is, this is not omitted }, Init:function (w,h) { This.width = W; This.height

So it is necessary to give an example here for the students: JavaScript Object-Oriented code example [Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]

Predecessors, the object-oriented all need to face the process first? When it comes to object-oriented programming, how can the logical relationships between objects be quickly combed and positioned? Where does object-oriented agi

All object-oriented languages should have inherited features, and JavaScript is no exception. There are multiple methods to implement inheritance in JavaScript. The following two are common methods. I. call inheritance. first look at the Code: First define a "person" Class The Code is as follows: // HumanPerson =

; for (var i = 0; i { D = a[i].split ('. '); The incoming arguments are segmented with the symbol '. ' and put into the D array. RT = D[0]; Determines whether the first value in the array is undefined and, if not defined, is defined as an empty object {} and assigned to the variable O Eval (' if (typeof ' + rt + ' = ' = ' undefined ') {' + rt + ' = {};} o = ' + rt + '; for (var j = 1; j { /* Loop traversal array d each value as key, add to

Some time ago, after learning "ajax self-taught manual", I realized that javascript can still be written like this. I have learned the concepts of classes in java, c #, and vb, and classes have functions such as inheritance, encapsulation, and polymorphism. Javascript is not an object-oriented language, but an explanat

This week's painstaking efforts have turned to the underlying code of several popular JS Script frameworks. Although the code is easy to understand, it has benefited a lot and lamented the greatness of people first ...... The exclamation is to ease the serious atmosphere and bring out the topic to be discussed today, "javascript object-oriented programming". Next

JavaScript object-oriented code is almost different from other common languages (JavaC # C ++. Therefore, it is necessary to give an example here: JavaScript object-oriented code example [Ctrl + A select all Note: If you need t

Because I used to be. net programmers, so even if you are working on the front-end, you are also used to writing js scripts in an object-oriented way. I think if you were or are still a third-generation programmer, you should be familiar with this. Speaking of js object-oriented, we have to mention prototype, the js bu

This article illustrates the simplest method of object-oriented tab implementation, sharing for everyone to reference, the specific contents are as follows Effect Chart: 1. Function description Click three buttons to display the corresponding tabs individually2, HTML code description 3, CSS Key code description /*in is the normal state of the tab, the default does not show * /. in

The OOP language gives us the ability to customize objects and variable types. Object Oriented Programming JavaScript is an object-oriented programming language (OOP). The OOP language gives us the ability to define our own objects and variable types. Objects have properti

The JAVA,C#,VB know the concept of class, and the class has the functions of inheritance, encapsulation, polymorphism and so on. And JavaScript is not an object-oriented language, it is an interpretive language. But we can also use JavaScript to implement inheritance, polymorphism.

Is enough to show how important an interface is in an object-oriented domain. But JS does not have built-in interface mechanisms like other object-oriented high-level languages (c#,java,c++, etc.) to determine that a group of objects and another group of objects contain similar characteristics. Fortunately, JS has a lo

Use new Object () to create an Object There are several methods for creating objects in javascript. Different methods can be used in different scenarios. The simplest is to use the new operator, for example: Copy codeThe Code is as follows: In this example, the person object is defined and its attributes and methods a

Differences between undefined, null, and NaN in JS, as well as interview questions about object attribute assignment, undefinednan (1) In the following three cases, the return type of typeof is undefined. -- When the variable is not initialized -- When the variable is undefined -- When the function does not return a specific value (undefined is returned when the

But there is no class concept in JavaScript, the so-called class is also simulated, through the function of the closure to simulate the class members and private members (for closures can see crossing boundaries: Closures)。 Here we will look at the "class" in JavaScript in a more down-to-earth way, bypassing some of the blunt principles. Since you are using function to simulate a class, write code to create

; var_this = This; for(vari = 0; I This. Count; i++){ //Set Index This. Acon[i].index =i; //add an event to a button This. Acon[i].onclick =function() {_this.cur= This. Index; _this.Switch(); }}}tab.prototype.Switch=function(){ //Remove All for(vari = 0; I This. Count; i++){ This. Ain[i].classname = ' in '; This. acon[i].classname = ' con '; } //Displays the current This. ain[ This. Cur].classname = ' in_active '; This. acon[ This. Cur].classname

Javascript object-oriented (2) code encapsulation. If you need code, refer to the following example: Step 1: create a "Mobile Phone type" The Code is as follows: Var MobilePhone = (function (){............})() Step 2: Consider the private attributes of these classes. Here I want to define the number of mobile phones that come out of the instance. The Code

We see how straightforward the concept of inheritance here is, "copy the prototype of a class to another class", OK, code is cheap, look at the codes: function Class1 () {} function Class2 () {} Class2.prototype = Class1.prototype; Class2.moreproperty1 = "Class 2 additional string"; Class2.moremethod1 = function () {alert (' Class 2 additional method ');} /* So, first of all, the CLASS2 has the same prototype as Class1, regardless of the constructor, two classes are equivalent. Subsequently, th

Examples of javascript object-oriented ideology code can be found below. The Code is as follows: