JavaScript

What is JSON Json:javascript Object Notation (JavaScript object notation). JSON is in the form of a list of items surrounded by braces "{}", separated by commas (,), and the item is the property name and attribute value separated by a colon (:).

This program is the use of 3.x Firefox browser can read the characteristics of local files, to achieve through the XMLHttpRequest upload large file features, and in the process can upload dynamic display upload progress. Slightly modified, and with

JavaScript literal volumeIn a programming language, a literal is a constant, such as 3.14.The number literal can be either an integer or a decimal, or a scientific count (e). 3.14 1001 123e5 string literal can use either single or

From the beginning, the arrows are part of the JavaScript, and in the first JavaScript it is recommended that you wrap the inline script code in an HTML annotation, which prevents browsers that do not support JavaScript from incorrectly dropping

One page reduction 10KB for a small site, is not what, but for large sites, the cumulative is a lot of traffic ... gzip compression is an effective and feasible approach, but requires Apache support (Apache has a common port solution with

Javascript----File Operations First, the function realizes the core: FileSystemObject object To implement the file manipulation function in JavaScript, the main thing is to rely on the FileSystemObject object. Second, FileSystemObject

Javascript Engine working mechanism JavaScript from definition to execution, JS engine in the implementation layer do a lot of initialization work, so before learning the JS engine working mechanism, we need to introduce a number of related

The substr () method extracts a specified number of characters from the start subscript in a string.Stringobject.substr (start,length); start must, length optional. Start is the subscript for the starting position of the intercept and must be a

JavaScript code can be included anywhere in an HTML document. But there are also the best ways to include JavaScript in HTML files. In the ... section. In the ... section. In the ... and ... sections. Scripts and external files, then

The BOM, also known as the browser object model, provides a number of objects for accessing the browser's functionality, which is irrelevant to any web content;BOM lacks the specification, each browser provider according to own idea expands it, then

In the previous article, we gave an overview of the preliminary explanation, before writing this blog to write a few classic cases, given that those cases are more comprehensive, and gradually have this blog, so for learning and in-depth JavaScript

This article reviews the basic grammar in the ECMAScript specification, and good friends in English can read the official documents directly. JavaScript is essentially a Class C language, familiar with C language friends, can be very easy to read

Strict mode (Strict mode) is a new feature of ECMASCRIPT5. ECMAScript5 can be backwards compatible with ECMASCRIPT3, but if you use strict mode, which ECMAScript5 "not recommended" ECMASCRIPT3 syntax feature will be all in the system, if it appears

The following is a summary of the JS date function encyclopedia, for your reference 1. Get the current time Copy Code code as follows: var date=new date (); 2. Date-converted data of the year, month and day known: Copy

ECMAScript can recognize two types of objects, one of which is called native object, which belongs to the language category, and is called host object, provided by the running environment, such as a Document object, Dom node, etc. Native objects is

This article is mainly about the use of JavaScript to format the string date to YYYY-MM-DD, the following words are not more, refer to the following code function FormatDate (date) { var d = new Date (date), month = ' + (d.getmonth () + 1)

Project front-end page needs to be implemented, the page no one to operate into the countdown, the following is the front-end code implementation. Set (Countdown function) switch var _mouseactivelistener_flag = true; Beforecount:

Here are some examples of direct communication between Flash and HTML files that use JavaScript, with each example having a brief step This article discusses 3 basic Flash/javascript communication methods: JavaScript to Flash

JavaScript Each statement ends with a semicolon, but because JavaScript has a semicolon automatic insertion rule, all the different programmers have different habits, some with a semicolon, and some without a semicolon, then whether to add a

This method cannot check whether the object's prototype chain has this property, which must be a member of the object itself. The in operation checks whether the object is named property. You can also examine the object's prototype to determine