JavaScript

1. Modifier . Any character * Match * The first 0 or multiple characters + Match + the first or more characters ? Matching? First 0 or 1 Character ^ Start with a character after ^ $ Ends with a character before $ [] Match a character in [] ()

The following code is my test code, which is important: Copy codeThe Code is as follows:/* global window, jQuery, validate_email, masterUI, $, rest */ /** Enable ECMAScript "strict" operation for this function. See more: *

Each function is created with a prototype attribute by default, which contains a constructor attribute and a hidden property _ proto _ pointing to the Object __. The value of the constructor attribute is the object of the function. If you add new to

Is there a "class" in Javascript? All objects In Javascript, except basic data (Undefined, Null, Boolean, Number, String), all others are objects ).In fact, objects in Javascript are a collection of data and functions. For example, we know:Copy

Complete the following cloze: Copy codeThe Code is as follows:/* Create a queue with head0 header and tail0 tail */ Function IntList (head0, tail0 ){ This. head = head0 | 0; This. tail = tail0 | null; } /* Return an IntList containing all the

Readonly and Disabled are two attributes used in a form. They both enable users not to change the content in the form field. However, there are minor differences between them, which are summarized as follows: Readonly is only valid for input

Confirm () method The confirm () method is used to display a dialog box with the specified message and OK and cancel buttons. Note: If you click OK, confirm () returns true. If you click Cancel, confirm () returns false. One type:Copy codeThe Code

In many cases, we use for to generate multiple node structures with the same structure, so we need to write a lot of code such as createElement, setAttribute, and appendChild. However, we only need an html template to clone existing nodes, including

The function is assembled by analyzing the document. cookie string. Review the operations on cookies in javascript: You can use document. cookie = "userId = 111"; to add a cookie. The full version can be used:Document. cookie = "userId = 111;

Simple javascript operation cookie version Copy codeThe Code is as follows: function setCookie (name, value, iDay ){ Var oDate = new Date (); ODate. setDate (oDate. getDate () + iDay ); Document. cookie = name + '=' + value + '; expires =' + oDate; }

There are two main parts: one is the rolling content part; the other is the JS rolling code part. There are only two sentences. I. Traditional rolling code use Javascript to horizontally scroll news content! [Ctrl + A select all Note: If you

Copy codeThe Code is as follows: window. onload = function (){ Var oDIv = document. getElementById ('ssssbox '); Var sytleElemt = window. getComputedStyle (oDIv ); For (var I = 0; I If ( Typeof sytleelemts [sytleelemts [I]! = 'Undefined '&&

Instance JavaScript code In the following code, we use the name attribute of the select element to set the attribute of the specific style to be accessed (in this example, the background color, this function can be used to set different CSS

The previous two articles have introduced how to achieve this step by dynamically loading JS files or JS modules. First, the module loading and callback functions are separated by a synchronization policy, and then the module loading and callback

Sort code Copy codeThe Code is as follows: function SortTable (sTableID, iCol, sDataType ){ This. oTable = document. getElementById (sTableID ); This. oTBody = this. oTable. tBodies [0]; This. colDataRows = this. oTBody. rows; This. aTRs = []; This.

Data Type JavaScript has five simple data types (also known as basic data types): Undefined, Null, Boolean, Number, and String. There is also a complex data type-Object, which is essentially composed of a group of unordered name-value pairs. Typeof

• Simulate block-level scope We all know that there is no block-level scope concept in JavaScript. We can simulate block-level scope by using closures. See the following example: Copy codeThe Code is as follows: (function (){ For (var I = 0; I // Do

Object Create Object Constructor Public, private, privileged, static member This, call, and apply Exception Handling Inheritance Prototype Object In JavaScript, we can say that everything is object. So what is an object? An object is a set of

1. DOM0-level event handlerReturns a function value to an event handler property. For example: Copy codeThe Code is as follows: var btn = document. getElementById ("myBtn "); Btn. onclick = funtion (){ Alert (this. id); // "myBtn" } Delete event,

1. Timeout call setTimeout () The setTimeout () method accepts two parameters. The first parameter is the function, and the second parameter is the time (in microseconds). The value ID is returned. Copy codeThe Code is as follows: setTimeout