JavaScript

1 underfined, NULL, 0, False, NaN, empty string logical result is False2 getting members randomly from an arrayvar items = [548, ' a ', 2, 5478, ' foo ', 8852,, ' Doe ', 2145, 119];var Randomitem = Items[math.floor (Math.random () * items.length)];3

OverviewRegular expressions are used to retrieve and replace text that conforms to a patternStandard Regular Expression syntax　　JavaScript support for regular expressions　　Alternative notation　　Reverse Surround// requirement: Replace

What is an object:object is a whole and provides some operations externally.What is Object-oriented:When working with objects, focus only on the functionality provided by the object, not on its internal details, such as jqueryObject-oriented is a

Prototype:Four states of the prototype:JavaScript Learning Note 09 (constructors, prototypes,)

Modal box This is also present in many front-end frameworks, but many front-end frameworks, such as bootstrap,amazeui,jquery, are extremely poorly compatible with IE6, so if you hand-write a modal box without any plug-ins, you can not only IE6 , it

JQuery's method of automatically scrolling to the top of the page This example describes how jQuery automatically scrolls to the top of the page. Share it with you for your reference. The specific implementation method is as follows: ? 1

How does jQuery determine whether the object with the specified id exists? Because jQuery returns the jQuery object no matter whether the object to be obtained exists or not. Therefore, in the past, it was impossible to determine whether JavaScript

Jquery controls the display of default values in the form input box This example describes how to display the default value in the jquery control form input box. Share it with you for your reference. The specific implementation method is as follows:

Regular Expression of javascript matching license plate number Matching characters include: Jing Z 12345-jing Z12345 ZF 12345-ZF12345 Temporary 12345 temporary 12345 Rules: First Digit: Chinese character or second digit: letter or Chinese

Delete the subnode created by javascript. It is a javascript node. This example describes how to delete a subnode created by javascript. Share it with you for your reference. The details are as follows: The node created by js does not know how to

Summary of the javascript space removal method and javascript Summary This example summarizes how to remove spaces in javascript. Share it with you for your reference. The details are as follows: Here str is the string to remove spaces: Remove

JQuery: Get the regular expression of the name of the uploaded file, jquery Regular Expression Method 1: $ ('Input [type = "file"] '). on ('change', function () {var reg =/[^ \/] * [\/] +/g; // The regular expression var name that matches the file

JQuery aggregate function instance This example describes jQuery Aggregate functions. Share it with you for your reference. The details are as follows: (Function ($) {$. fn. aggregate = function (seed, func) {var _ r = seed = null? "": Seed; this.

How to get the page description in js This article describes how to obtain the page description by js. Share it with you for your reference. The specific implementation method is as follows: ? 1 2 3 4 5 6 7 Var meta = pt.doc

JQuery + ajax implementation without refreshing cascade menu examples This article mainly introduces the jQuery + ajax Implementation of the brushless newest cascade menu example. The code is complete and practical. If you need it, you can refer to

Js-compatible methods for Firefox to retrieve image width and height This article describes how to use JavaScript to obtain image width and height compatible with Firefox. Share it with you for your reference. The specific implementation method is

Summary of the javascript space Removal Method This example summarizes how to remove spaces in javascript. Share it with you for your reference. The details are as follows: Here str is the string to remove spaces: Remove all spaces: The Code is

How to delete a subnode created by javascript This example describes how to delete a subnode created by javascript. Share it with you for your reference. The details are as follows: The node created by js does not know how to delete it at the

Solve the problem that JQuery boxy plug-in does not display corner images in IE, jqueryboxy The JQuery boxy plug-in is easy to use, but some problems may occur. For example, the corner of the pop-up box cannot be displayed in IE. This blog will

Method summary that returns multiple values in the JS method, js Summary In JS programming, sometimes two or more data needs to be returned in one method. The following methods can be used to achieve this: 1. Use arrays as follows: JS function