JavaScript

1 Problem descriptionIn a dialog box, the user enters a set of strings that need to satisfy a length of 1 to 6 and need to be made up of 0-9,a-z, or A-Z, and other use cases are illegal.2 Equivalence class Partitioning Valid

Today in the project to develop a calculation of the amount of functionality, I started to do this:egvar amount + = parsefloat (0.01+0.02);Results: 0.0300000000000000001Why is it?Search the parsefloat theme:1. The parsefloat () function---Parse

Article Starter: http://www.cnblogs.com/sprying/p/4349426.htmlThis article lists the general JS type detection method, is the construction of JS knowledge system of a small piece, this article is my early summary.In JS, there are 5 basic data types

The JavaScript language execution environment is "single thread"Only one task can be completed at a time. If you have multiple tasks, you must queue, complete the previous task, and then perform the latter taskThe JavaScript language divides the

Recently participated in the development of the M3 project in the company, this project is a front-end page developed using HTML5 , after development, the project address is written to Android, IOS Shell source code, so that when the application is

JS, like other dynamic languages, can write higher-order functions, so-called higher-order functions are functions that can manipulate functions. Because the function in JS is a thoroughly bottom object, belonging to the first class of citizens,

The Window object has two main timing methods, namely settimeout and setinteval their syntax is basically the same, but the completed function is different. The SetTimeout method is a timed procedure, that is, what to do after what time. When

DIV center methods and DIV center Methods 1. 1 body {2 text-align: center; 3} Disadvantage: All content in the body is centered together   2. . Center {position: fixed; left: 50% ;} Disadvantage: you need to set the position attribute. When a

Detailed description of special events and methods in JQuery Mobile 1. Touch Screen events-Touch events Tap Triggers after a quick, complete touch event. My actual test results: click it, and the effect is similar to that of pressing the common

Summary of adding and deleting elements to and from Array objects in JavaScript Array This article describes how to add and delete elements to and from a JavaScript Array object. Examples of how to use pop, push, splice, and concat methods are

How to Implement the tab menu Switching Effect Using js + css This article mainly introduces how to implement the tab menu switching effect through js + css, and describes the implementation code of css and js in the form of examples, which has some

Details about Ajax get and post methods in jQuery We have discussed the ajax load () method in jQuery in the previous sections. Our friends have a very good response. Today we will explain Ajax get, post, and other methods in jQuery. I hope you will

JQuery UI plug-in to customize the confirm confirmation box, jqueryconfirm This document describes how to customize the confirm confirmation box of the jQuery UI plug-in. Share it with you for your reference. The specific analysis is as follows:

JavaScript implements the method to add Zero output before the number according to the specified length, javascript Length This example describes how to add Zero output before the specified length in JavaScript. Share it with you for your reference.

Javascript 2048 games, javascript2048 There is no technical content, but it is used to practice code logic. To ensure the code structure is clear, I write the logic control part in the global variables. The user interface operations are encapsulated

Jquery uses the closest selector to modify the upper-level element. This article mainly introduces jquery's method of modifying the upper-level element through the closest selector. The example shows how to use the closest selector in jQuery, which

Example of extending the Array contains method in JavaScript, arraycontains The Array in javascript does not have the contains method, which is sometimes inconvenient. The contains method is implemented very easily:Copy codeThe Code is as

Jquery image switching plug-in and jquery switching plug-in Copy codeThe Code is as follows:/*** Image switching plug-in* Dependence jquery-1.7.2.min.js**/(Function ($ ){// Call method $ ('# silder '). imgSilder ({s_width: 564, s_height: 293,

Introduction to the Callback control process in JavaScript, javascriptcallback Callback, which is everywhere in javascript, is a disaster for process control and has obvious disadvantages: 1. There is no explicit return, which is prone to redundant

Introduction to arguments and overloading in Javascript, javascriptarguments Due to language design errors, arguments can be considered as an array.Copy codeThe Code is as follows:Function zero (){Console. log (arguments [0]);}There will also beCopy