JavaScript

Waves Essay JavaScript inherited notesPrototype (prototype): A prototype is an object that other objects can use to implement property inheritance/* Notes:* 1. Class-based inheritance: the way to inherit from the prototype chain* 2. Prototype

　The program control statements in JSThere are three types of execution structures for common programs:1. Sequential structure2. Branching structure3. Cyclic structureSequential structure: The program executes from the first line and executes

In JavaScript you can use Try...catch to do exception handling. For example:Try {Foo.bar ();Catch (e) {":" + e.message);}The system anomalies we may get at the moment mainly include the following 6 types: Evalerror: Raised when a error

The DOM is an API (application interface) for HTML and XML documents.All DOM objects in IE are implemented in the form of COM objects, so it is important to note that DOM objects in IE are inconsistent with the behavior or activity characteristics

Unlike traditional object-oriented languages, which are inherited by classes, there is no traditional "class" in JavaScript, and JavaScript is inherited by constructors. JavaScript constructors are often confused with "classes", just because they

For each page you need to write to App.json pages, so add our new "Pages/detail/detail" to the "pages" array. If the new page is an item in the bottom Tabbar column, it also needs to be added to the list array in Tabbar, we are the new page when the

Recently made its own website, call Baidu Map JS API, on the page display some coordinate points. The problem is that when the coordinate point exceeds 10, convertor.translate (Temppointarr, 1, 5, translatecallback) after execution, the state of the

JavaScript setup Forms Basic validationAs follows:12345 User Registration 6 - the98 About -101102 User name:103104 must enter Chinese character name the106107108 Mobile Number:109 the mobile phone number must meet the conditions 111 the113 the

With the HTML DOM, you can navigate through the node tree using node relationships. 1.HTML DOM Node listThe getElementsByTagName () method returns a list of nodes . The node list is an array of nodes.The following code selects all the nodes

There was a problem at work yesterday: the IndexOf () method of the array is not valid in IE8.The following code in IE8 error " object does not support" indexOf "property or method ":var arr = [n/a];var index = Arr.indexof (3);Workaround 1: Add

First, function definition1. Function declarationfunction Add (i,j) { return i+j; }Features: 1, function declaration defines the function to be pre-placed. To know when the JS code execution, there will be a pre-parsing, pre-parsing the variable

Knowledge pointsNow this label is not advocated for use because it does not conform to the functional separation of the standard (structure, style, behavior). 1.behavior scrolling way "alternate": means rolling back and forth "scroll" between the

Summary of operations related to jquery checkbox, jquerycheckbox Operations related to jquery checkbox-select all, reselect, and retrieve all selected checkboxes 1. Select All $("#btn1").click(function(){

Java Spring transaction rollback details, rollback Pring Spring transaction rollback 1. Problems Encountered When there are multiple database storage operations in one method, database operations in the middle are incorrect. The pseudocode is as

The difference between Jquery ajax post and GET is described in detail, jqueryajax 1: GET access to the browser is considered to be idempotent It means that the same URL has only one result. [the same means that the whole URL string is exactly

Use a custom image instead of the native checkbox to achieve full selection, deletion, and submission, The UI sister thinks that the native checkbox check box is too ugly and must be replaced by images. The effect is similar to the following: To

Native JS achieves constant speed image carousel animation, while js achieves constant speed JS implementation carousel diagram implementation result diagram: Requirements:1. dynamically add small dots Based on the Image2. Move the target to a

Some tag learning in html and html Tag Learning Today, I read the manual and learned many HTML5 attributes. The summary is as follows: Background is used to set the Background of the page, followed by the image address Bgcolor is used to set the

Solve the problem that phpcms images are too large to break through the form Image Adaptive Image scale down proportionally,Img, a img {border: 0; margin: 0; padding: 0; max-width: 590px; width: expression (this. width590? 590px: this. width);

Test the efficiency of the List. ToArray () method. Previously, I always thought that because the internal implementation of List is an array, the implementation of ToArray only returns the array. I tested it today and found that it wasn't that.