JavaScript

input Box detection only allow input of numbers, otherwise red warning Submit JavaScript example four (input box number format detection)

"height:300px;width:100%;background: #ccc;"> "Top"> "height:1900px;"> JavaScript scroll bar dropdown navigation fixed

The JavaScript loop statement------------------while Loop statement.While when the loop condition is true, the loop state is maintained until the loop is exited when the loop condition is false.The template is as follows:hello worldvar

I will not ' use strict ', so the article is not rigorous. Originally, the current JavaScript is what you love to see it what it is.For example, what do you think of this remark:var o = new SomeClass ();Create a pair of classes, yes. At first glance,

The For loop in ECMAScript does not create a local context relative to C/A + +. for (var in {a:1, B:2}) { // Although the Loop has ended but the variable k is still in the current scopeAt any time, a variable can only be declared by using the var

JavaScript variables, scopesThe data types of JavaScript are divided into basic data types and reference data types,1. The basic data types include NULL, Undefined, Number, Boolean, and string types, and these five basic data types can be determined

Introduction: Yesterday interview when the interviewer asked how to implement a fixed navigation bar, after I answer the interviewer asked me what problems may exist, how to optimize?I didn't answer the question very well, but I think there are two

ObjectiveI believe that we are accustomed to jquery or underscore and other common array-related operations such as $.isarray,_.some,_.find and so on. Here is nothing more than the original JS array operation more packaging.Here is a summary of

1. Push Method (Array)Appends a new element to an array and returns the new array length.Arrayobj.push ([Item1 [item2 [...] [Itemn]])2. Pop Method (Array) ()Removes the last element from the array and returns the element.Arrayobj.pop ()You can use

There are already a lot of QR code coding and decoding tools and code on the network, many of them are server-side, which means that a server is needed to provide two-dimensional code generation. In the light of server performance considerations,

JavaScript gets the parameters in the current page URL can use the search method of location, get to the URL? The following sections, such as Http:localhost:8080/manager/index.jsp?id=1Use the search method of location to get to the string? id=1;

Original: JavaScript background code to manipulate HTML table methodsvar rowNum = 0,filenum = 0; Line number and column numbervar Onewrow; Defining Insert Row Objectsvar onewcell1,onewcell2; Defining Insert Column Objectsvar filenum = 1;function

In general, the scope chain is for the variable, JS inside a large scope, there are only two scopes, global scope and function internal scope, if function 1 and define the function 2 (usually anonymous function), then there is a scope chain global

November 7, 2014 17:10:40I have written a few similar articles before, and now it seems to be more elementary, to get a high-level simpleScenario: The background to upload the game, the number is not sure, so use dynamic Add input node method to

As a JavaScript engineer, when writing a tool library, in general, you need to provide the following modules.Core module: core.js$namespace Register Namespaces:$namespace (' Human.software.dom '); Window.human.software.dom$package multi-module

In JavaScript development, it is often necessary to do a variety of validation or formatting of the date type of object, but JS does not provide so many such fine functions, so we have to use prototype expansion, the following is my own

HTML5 + Canvas + jQuery call the mobile phone photo function to upload images (2) The previous article only talked about front-end operations. This article specifically involves Java background processing. The front-end submits Base64 encoded image

JavaScript window. location object, javascriptwindow Window. location is often used, and its structure is hard to remember. It can be easily sorted to facilitate future queries. ExampleURL: http:// B .a.com: 88/index. php? Name = kang & when = 2011 #

JQuery plugin Development Guide and jquery Development Guide First, let's take a simple look at the most orthodox jQuery plug-in definition: Copy codeThe Code is as follows:(Function ($ ){$. Fn. Plug-in name = function (settings ){// Default

JavaScript code to retain N digits after the decimal point, js to retain the decimal point In JS, The toFixed function is usually used to retain the N digits after the decimal point. Copy codeThe Code is as follows: The rounding conversion function