JavaScript

What is JavaScript? JavaScript is a scripting language that is widely used in the development of client Web pages (browsers), such as adding dynamic functions to HTML pages, such as responding to users ' various actions. JavaScript is a scripting

Before the interview front end, encountered an interview problem, there was no thought so did not answer out, today organized a bit and everyone share under: The original title is: Use the object method to create a 2x2 table (table), the second row

JavaScript does not have a mouse object, and getting the mouse coordinates depends on the powerful event object. By listening to the MouseMove of the document, we can get the mouse position in real time. But!! Event and mouse-related properties

This example summarizes the common how-to techniques for javascript arrays. Share to everyone for your reference. Specifically as follows: Objective I believe that we are used to jquery or underscore and other such libraries commonly used in the

1.repeat method: Repeats a string to itself n times. For example: Repeat ("Chaojidan", 2)-> Chaojidanchaojidan Method 1: Copy Code code as follows: function repeat (str,n) { Return Array.prototype.join.call ({length:n+1},str);

The array of Javascript arrays, both an array and a dictionary (Dictionary). Let's take a look at the use of arrays. Copy Code code as follows: var a = new Array (); A[0] = "Acer"; A[1] = "Dell"; for (var i in a) { alert (i)

1, the creation of the array var arrayobj = new Array (); Create an arrayvar arrayobj = new Array ([size]); Create an array and specify the length, note not the upper limit, is the lengthvar arrayobj = new Array ([element0[, element1[, ...)　[,

Adapter Mode description Description: Adapter mode, generally for the interface to be used, does not conform to the application or use of this system, but need to introduce the middle of the adaptation layer class or object situation; Scene:

Before I was in the prototype chain of JavaScript, prototype inheritance and identifier lookup were somewhat confusing, For example, the following code: Copy Code code as follows: function Foo () {}; var foo = new Foo ();

Please see the details of the note, here is not more BB, The code: ///detect the validation/* time in the form that cannot be empty (. notnull): 2012-6-6 Function: A pair of form labels under a multiple (including a) Form need to submit, use

The most common occurrence of a JavaScript value type conversion is the conversion of string and number between the two types of values. You can convert a number value to a string by calling 4 functions (in fact, JS converts the number value to

In JavaScript, object conversion to Boolean is very simple: all object converts to Boolean are true; even new Boolean (false) Such an object is still true after conversion to Boolean. Copy Code code as follows: var x = new Boolean

Usually our website will load some JS code, statistics ah, Google ads Ah, Baidu Alliance Ah, Ali mother Advertising code Ah,A heap, finally make the page loading speed is very slow, very slow. Solution: Change the way a JS contains, so that the

The examples in this article describe the array sort and reverse usage in JavaScript. Share to everyone for your reference. The specific analysis is as follows: The sort () method is used to sort the elements of an array. Reverse () to reverse the

About string test splitting in regular expressions. We generally have test () and Exec () Two methods, the difference between the two methods I do not elaborate here, mainly is the test () returns a Boolean value, EXEC () returns a matching array of

As with the Java language, you can save objects by serializing and deserializing them in JavaScript. In the ECMAScript 5 standard, Object serialization in JavaScript is accomplished by Json.stringify (), while deserialization is achieved by

This paper summarizes some JS common functions, including data manipulation, character replacement operation, date and decryption operation function, and some simple validation functions. Convenient for everyone to consult the reference. I believe

In JavaScript, you can use classes (class) to implement Object-oriented programming (object Oriented programming). However, the classes in JavaScript are different from Java, and they are defined and used differently. Definition of classes in

Original topic: Given a sequence of unordered integers, find the longest sequence of consecutive digits. For example: Given [100, 4, 200, 1, 3, 2], The longest sequential number sequence is [1, 2, 3, 4]. The solution to the side dishes:

The example in this article describes how JavaScript uses a for-loop batch registration event that does not correctly get indexed values. Share to everyone for your reference. The specific analysis is as follows: Many friends may encounter a