JavaScript

Program Interface in: specify several methods and the method name. (Because the tasks to be completed in the program are implemented through functions or methods .) Interface in javascript: compare an "type object" of the instance with the

1. built-in objects in Javascript In addition to built-in objects in Javascript, we are familiar with the following objects: • Array • Date • Math • String • Regexp •...... Each object has its own attributes and methods. For example, we often use

I. Introduction CopyCode Code: var A = {n: 1 }; A. X = A = {n: 2 }; Alert (A. X); // --> undefined This is the method Cai found when reading jquery source code. The second sentence A. X = A = {n: 2} above is a continuous value assignment

Scope GLOBAL SCOPE Local Scope Scope chain Execution Context Activity object Closure Closure Optimization A previously unknown concept-closure emerged in JavaScript. What is a closure? On the surface, it is a closed package, which is related to the

Copy codeThe Code is as follows: function obj2str (o ){ Var r = []; If (typeof o = "string") return "\" "+ o. replace (/([\ '\ "\])/g," \ $1 "). replace (/(\ n)/g, "\ n "). replace (/(\ r)/g, "\ r "). replace (/(\ t)/g, "\ t") + "\""; If (typeof

In daily website development and web application development, we often need to effectively call functions related to date and time formats for Javascript processing, javascript contains some of the most basic built-in processing methods. Of course,

Javascript is an object-based, event-driven, and secure scripting language. It is widely used, not just webpage, but not trapped by jsp. Based on the object, you do not need to specify the type of the variable. You can give it a value of 3, which

Copy codeThe Code is as follows: var a; // declare a variable with the identifier Function a () {// declare a function. The identifier is. } Alert (typeof ); "Function" is displayed, that is, the priority of a function is higher than that of var.

Copy codeThe Code is as follows:

Each function we create has a prototype attribute, which is an object that contains attributes and Methods shared by all instances of a specific type. The advantage of using it is that it allows all object instances to share the attributes and

Rounding in decimal format These two sections of code help you round the list and show the price or order more useful for you: Code 1: Copy codeThe Code is as follows: function CurrencyFormatted (amount ){ Var I = parseFloat (amount ); If (isNaN (I)

JavaScript: Copy codeThe Code is as follows: // The initialization page Function init (){ Var ary = JSONToArray (XMLReader ("node", "content. dibi ")); Var divtoc = document. getElementById ("div_toc "); PageCount = ary. length; For (k = 0; k Obj =

How complicated is event? It can be seen how the best addEvent came into being six years ago, and jQuery paid more than one thousand six hundred lines of hard-earned code (v 1.5.1) after six years, the browser with various cores is ready. I tried

In general, functions in JavaScript can: ◆ Assigned to a variable ◆ Attributes assigned as objects ◆ Passed into other functions as parameters ◆ Returned as a function result ◆ Create with words Function object 1.1 create a function A method of

Var ie =! -[1,]; This code was called the world's shortest IE judgment code before IE9. The code is short but contains a lot of basic javascript knowledge. In this example, the toString () method of the array is called before code execution. When

Write it casually! Bored! If the Code has bugs, you are welcome to make a strong shot! JS CODE Copy codeThe Code is as follows: HTML CODECopy codeThe Code is as follows: Date Demo

Chapter 1: loading and execution The JavaScript engine of the browser is optimized at the compiler layer;When the Browser executes JavaScript code, it cannot do anything else (single process) at the same time ), this means that every time the tag

Of course, the length of the HTTP header cannot be counted during a request. Therefore, when the length of the request packet is at the critical point of the maximum transmission unit, an additional HTTP header can lead to an IP group, so there is a

1. Introduction At the end of my article "how to use the same HTML clip-continued on multiple pages", I mentioned the features of JavaScript sequential execution. Although modern browsers can download JavaScript in parallel (Some browsers), their

The data item used as the sort basis is called the "Sort code", that is, the key code of the data element. To facilitate searching, we usually want data tables in the computer to be sorted by key codes. For example, the semi-query of an ordered