JavaScript

The SUP method returns the superscript string defined using the HTML SUP Tag property. The syntax is as follows: Copy Code code as follows: Str_object.sup () Tip: This method does not conform to the ECMA standard and is not

Classes: Collections Arrays ArrayList SortedList extends ArrayList HashMap HashSet */ /**************** Collections Note:sort () return a new List ****************/ function collections () {} Collections.sort=function () { if (arguments.length==1) {

Closure this thing, say difficult also difficult, said not difficult also not difficult, below I to own understanding to say the closure Explanation of closureFor functional languages, functions can save the internal data state. For a compiled

1.null and undefined * Get a property from an object that has a value of undefined if the object and its prototype in the chain do not have the property.* A function that returns the value to its caller without an explicit return value is undefined.

Mobile of keyboard control layer Please press ↑, ↓, ←, →, What's the effect of a try? Control key Settings: Move Up: Move Down: Move Left: Move right: Each move Px; keyboard control layer Mobile please press , ↓, ←, →,

One, the external is global, internal is local variable. Second, add var as local variable (within the method), without VAR as global variable (once used in the method) Copy Code code as follows: In the test method above, when

Join ([separator]) array elements are grouped into strings ToString () represents an array as a string Reverse () array inversion--change the original array itself ValueOf () returns an array value Copy Code code as follows:

CreateElement is the concept of establishing child nodes, which are child elements, in HTML with the application of the consortium DOM to the image model. Copy Code code as follows: Note: value is actually a character, if

Introduction to JavaScript definition : JavaScript is a scripting language, requires a host file, and its host file is an HTML file. JavaScript is a lightweight programming language. JavaScript is a programming code that can be inserted into an

JavaScript introduction is too easy, resulting in almost everyone casually see can get started, 0 basic people learn a 35 days can declare oneself mastered JS. But really mastering JS is a very difficult thing. It is difficult to make progress if

JS is a total of 5 original values, 6 typeof can be judged, 9 native built-in constructors. These 569, constitute the basis of the JS language. 5 Original values are: numbers, characters, Boolean, null,undefined typeof can judge: number,

A summary of the method of array Will change the original array Push, Unshift method, return length. Added is worth the return length, the other returns that element Pop,shift returns the element Reverse returns the element Splice

Each Javascript function can access a special variable-arguments within its scope. This variable contains a list of all the arguments passed to the function.The arguments object is not an array. Although syntactically it has the same place as an

First, what is the constructor Constructors are common in some object-oriented languages, such as Java, C + +, and PHP. In JavaScript, a constructor is first a normal function that can be invoked using the new operator and generate a special type

Operator precedence in JavaScript is a set of rules. This rule controls the order in which operators are executed when evaluating an expression. Operations with higher precedence are performed Fuxian to lower-priority operators. For example,

The first and second sections of this series introduce JavaScript module prototypes and theoretical concepts, and today we describe how they can be used in combat. I'm using a very popular library require.js. One, why should use Require.js?At the

escape definition and usage The escape () function encodes the string so that it can be read on all computers. Parameters Description String Necessary. The string to be escaped or encoded. return value

1, control "vertical dozen", horizontal dozen "and" the margins of the page. (1) 2) & #111nclick = "& #106avascript:p Rintit ()" > #111nclick = "& #106avascript:p Rintsetup ();" > & #111nclick = "& #106avascript:p Rintpreview ();" > & #111

A large string connection is best done by using arrays, putting each substring into an array element, and then performing a join () connection, which is significantly more efficient than + =. Therefore, you can write a simple StringBuffer class

Note: The following content is based on the OnLoad event of GIF in IE, so all test ie only Several pictures that need to be used Let's look at a simple fact: Copy Code code as follows: Your IE should pop up a whole bunch