JavaScript

Data type of JavaScript Number: Shaping, floating point type String: Character data, JavaScript does not distinguish between individual characters and strings, Any character or string can be enclosed by quotation marks or single quotes. Boolean:

JavaScript Getting Started learning the first JS Foundation JavaScript Getting Started learning the second JS type JavaScript Getting Started learning the third JS operation JavaScript Getting Started learning fourth JS objects and arrays JavaScript

Learn English: Dom: Document Object model. Document Object Model Bom: Browser object model. Note: You can also call the Window object model. (Window object model.) API: Application programming interface. Note: Dom can actually be viewed as an

1, Function: A function is a JS code that is defined once and can be invoked multiple times. When a function is called by an object, the function is called the method of the object. function Cssrain (x, y) { Code } Explain: Cssrain: For the

ScrollHeight: Gets the scrolling height of the object. ScrollLeft: Sets or gets the left distance between the left edge of an object and the current visible content in the window ScrollTop: Sets or gets the distance between the top of the object and

For the type of judgment, JavaScript uses typeof. Chestnuts: Console.log (typeof null); Object Console.log (typeof []); Object Console.log (typeof {}); Object Console.log (typeof new Date ()); Object Console.log (typeof

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function QuickSort (arr) { //If the array has only one number, it is returned directly; if (arr.length Centernum) { arrright.push (Arr[i]) } } return QuickSort (arrleft). Concat (Centernum,quicksort ( Arrright)); }

$(this).css({"left":Math.sin((ahd*index+ainhd))*radius+dotLeft,"top":Math.cos((ahd*index+ainhd))*radius+dotTop}); Effect Chart: Analysis Diagram: In the figure above: Black: Is the outer container; Yellow: is a picture that needs to be oval-

by Dknt from Bbs.blueidea.com Search the search this, find no answer. So I wrote one, a lot of programs around this problem, often artificial to decide where to truncate, too much trouble. Implementation content: Truncate a section of text

From:JavaEye.com Note the definition of object classes in JavaScript, using function to define object classes, initializing objects using the new operator function person (name, age) { THIS.name = name; This.age = age; this.tostring = function () {

From:JavaEye.com To enumerate the functions of a JavaScript object: function iterator (obj) { For (Var, in obj) { Document.writeln ("" + Property + ":" + Obj[property] + ""); } } A simple example (test.js): function Employee () { THIS.name =

This Document Object model allows access to all document content and modifications, as regulated by the World Wide Web Consortium (WWW). This pattern is supported by almost all modern browsers. Most of the traditional DOM features in the Consortium

The Exec method matches a regular expression with a text-search string. Returns an array of results if a match is found; Otherwise, NULL is returned.Grammar Regexpobject.exec (string); The following are the details of the parameters:

IgnoreCase is a read-only Boolean property of a regular expression object. It specifies whether a specific regular expression performs a case-insensitive match. , which is created with the "I" property.Grammar Regexpobject.ignorecase

Global is a read-only Boolean property of a regular expression object. It specifies whether a specific regular expression is to be matched globally. Otherwise it is created using the "G" attribute.Grammar Regexpobject.global The

A regular expression is an object that describes the character pattern. The RegExp class of JavaScript represents regular expressions and string and regular expression definitions, using regular expressions for powerful pattern matching and

This method returns the value of a number rounded to the nearest integer.Grammar Math.Round (x); The following are the details of the parameters: X: A number return value: Returns the value of a number rounded to

This method returns the absolute value of a number.Grammar Math.Abs (x); The following are the details of the parameters: X: A number return value: Returns the absolute value of a number Example:

This will return 1/2 square roots; equivalently, 1 over 2 of the square root is about 0.707.Grammar Math.sqrt1_2 Example: javascript Math sqrt1_2 property This will produce the following results: Property Value is:0.70