JavaScript

The Number.min_value property belongs to a static number object. This represents the constants that JavaScript can work with as small a positive number as possible. The actual value of the constant is Grammar You can access properties using the

Void is an important keyword in JavaScript that can be used as a unary operator before its single operand, and may be of any type. This operator specifies an expression that does not require a return value to be evaluated. Its syntax may be one of

A function is a set of reusable code that can be invoked anywhere in the program. This eliminates the need to write the same code again and again. This will help programmers write modular code. You can divide large programs into small, manageable

We've seen that while loops have different variants. This chapter will introduce another popular loop called A For loop.For loop The For loop is the most compact form of the loop and consists of the following three important parts: The

One, what is JavaScript?1. JavaScript is a scripting language that interprets execution 2. JavaScript is a programming language that can be used to add interactivity to a Web page. 3, JavaScript is not java. JAVASCRITP was developed by Netscape, and

Copy Code code as follows: var person = new Array (); PERSON[0] = 120;//defines a person's weight of 120 kg PERSON[1] = 21;//Defines the age of the person 21 years old document.write ("body weight =" +person[0]+ "age =" +person[1])/output

This method is quite useful, many programming languages have a corresponding implementation, JavaScript is no exception, however, when I run the following code in IE: Copy Code code as follows: var arr = [1,2,3]; Alert (Arr.indexof

Online collection of KeyCode value to facilitate everyone to find: KeyCode 8 = BackSpace BackSpace KeyCode 9 = Tab tab KeyCode = Clear KeyCode = Enter KeyCode = shift_l KeyCode = control_l KeyCode = alt_l KeyCode = Pause KeyCode = Caps_lock KeyCode

Copy Code code as follows: function $ (ID) {return document.getElementById (ID); The above is not a problem for the new version of the browser, if you use the old browser, you can use the following function Copy Code code as

Combined use of JavaScript and select parts In the process of writing a program, I want to implement the option that is selected when the Select Object does not need to submit the button, but directly triggers the action, and after the action occurs

One: JS supports the Unicode character set, so you can use the Chinese name function. Two: JS in Var has not initialized the variable, the default is undefined Third: For variables that are not declared and unassigned, if used directly, a

Netscape's JavaScript at the time made it the top of the browser wars with IE, and then IE created JScript to deal with Netscape's JavaScript, and in fact JScript basically copied JavaScript, This is one of the things that Microsoft has been accused

1, decodeURI () parameter: string Function Description: Decodes the URI encoded by the encodeURI () function. Instance: The http://www.jb51.net/My%20first/can be decoded to http://www.jb51.net/My first/ 2, decodeURIComponent () parameter:

One, Window object-------------------------------------------------- ------------------- Object Properties window//window itself Window.self//reference to the window window=window.self Window.name//name for Windows Window.defaultstatus//Set window

HTML5 's WEBAPI interface can easily use a few lines of code to achieve the Click Button Copy area text function, do not need to rely on flash. The code is as follows: * * Create Range object /Const range = Document.createrange

JavaScript data type: One of the most fundamental features of a programming language is a set of data types that it supports. These are the types of values for programming languages that can be represented and manipulated. JavaScript allows three

Cookie Overview In the previous section, you used an immutable framework to store shopping bar data, and the product display page was constantly changing, although it was not rigorous to achieve a global variable. For example, if you right-click

We all know that Javascript typeof can get the type of a variable, but the TypeOf return value is only six "number," "String," "Boolean," "Object," "function," and "undefined." In fact, Javascript also has a number of special categories such as

Introduced The responsibility chain pattern (Chain of responsibility) is a way for multiple objects to have the opportunity to process the request, thus avoiding the coupling between the sender and the recipient of the request. Connect the object

Introduced Starting with this chapter, we'll step through the implementation of the various design patterns used in JavaScript, where I'm not going to introduce the theory of the schema itself too much, but only focus on implementation. OK,