JavaScript

Steps required by the HTTP transaction:Next, the browser and the remote Web server through the TCP three handshake negotiation to establish a TCP/IP connection, similar to the Walkie-talkie over (complete) Roger (understand)TCP/IP modelTCP is the

ObjectiveJavaScript is not the same as the language of the program, such as C # or Java, he does not have the concept of "class", although the newest ECMAScript put forward the concept of class, we do not useIn the case of C # and Java alone, it

Important: Unlike the slice () and substr () methods, substring () does not accept negative parameters.The substring (Position1,position2) method is used to extract the character of a string intermediary between two specified subscripts. includes

Use JavaScript to take the float type decimal point two, example 22.127456 to take 22.13, how to do?1. The dumbest way ... [I'll do what I do ...]1function get ()2{3 var s = 22.127456 + "";4 var str = s.substring (0,s.indexof (".") + 3);5 alert (str)

Original link: Detect If a Function is Native Code with JavaScriptOriginal Date: 2014-08-17Translation Date: 2014-08-20Translators: AnchorI always run into situations where I need to check if a function is native code-a very important part of the

I. Event delegationWhat is an event delegate? In reality, there are 100 students who receive a courier at noon, but this100 students can not stand at the school gate at the same time, then will entrust the doorman to collect, and then handed over to

JavaScript to determine the implementation code of page closure and page refresh, and javascript page refresh Today, because the project needs to determine whether the user's behavior is disabled or refreshed when the user leaves the page.Although

Js select and transfer the navigation menu sample code, js navigation menu sample code Implement html Interface Select and Go NavigationSelect a topicCross-checking fieldsWorking with radio buttonsSetting one field with anotherValidating Zip

Use typeof to determine whether a function exists in the context When loading a window, use typeof to determine whether the function exists in the context. 01

JavaScript Promise and promise This article focuses on the usage of promise. For a long time, JavaScript processing Asynchronization is based on callback, And the callback mechanism in the front-end development field is almost deeply rooted in the

IE6 Common Bugs and ie6bugs 1. IE6 weird parsing: Calculation of padding and border into width and heightCause: Non-box model Parsing is caused by no document DeclarationSolution: add the Document declaration.   2. IE6 doubles the margin value when

Js event listening mechanism (event capture) Summary, js listening During front-end development, we often encounter the problem of adding events to page elements. There are also many js methods for adding events, which are directly added to the page

Small programs for converting units of square meters, acres, and hectares implemented by javascript, and converting units of javascript Javascript converts square meters, acres, and hectares. You can use the url to pass parameters to specify the

JS-related drop-down field effects for keyword search, js keyword search Hello World Js achieves linkage between two drop-down boxes There are two basic methods:Method 1:The menu data of menu 1 is provided. When a menu item is

Practical explanation of selector priority order in CSS; css SelectorWhen some of our programs apply styles to an element (for example, div), they may have some questions. Why cannot I overwrite the styles that I wrote behind the scenes, isn't css a

General js method: checks whether the browser has installed the specified plug-in (IE and non-IE) /** Check whether the specified plug-in has been installed ** pluginName plug-in name */function checkPlugins (pluginName) {var np = navigator.

Develop NodeJS applications based on Docker and dockernodejs For this Node Application This application contains a package. json, server. js, and A. gitignore file, which can be easily written. . Gitignore node_modules/* Package. json { "name":

Css code sorting and collection and css code collection I have sorted out the css code that I have used before, and there may be many ways to implement one effect. Here I have sorted out the code that I personally think is compatible and has a

Description of the Extjs component inheritance template (using GridPanel as an example) 1. Override the initComponent () method and call the initComponent () method of the parent class in this method. For example, subclass. superclass. initComponent.

Js star rating, js star rating The html is as follows: Css style: .starts,.starts ul{float:left;}.starts{padding-left:16px;padding-top:7px;}.starts ul li{width:32px;height:31px;float:left;background:#ddd;padding-right:3px;}.starts ul