JavaScript

1. typeoftypeof return value is a string, there are six typesNumber,string,boolean,function,undefined,object,typeof are commonly used to differentiate between undefined and function types, and cannot distinguish between complex types, such as array

Currying is a core concept of functional programming and a useful tool for any developer ' s toolbelt.Example 1:Let F = a = b = + c =a+b+ = f (1) (2) (3// 6Example 2:DOCTYPE HTML>HTML>Head> MetaCharSet= "Utf-8"> title>JS Bintitle> Scriptsrc=

The first and second sections of this series introduce JavaScript module prototypes and theoretical concepts, and today we show you how to use them in combat.I am using a very popular library require.js.First, why use Require.js?At the earliest, all

JavaScript Object-oriented programming var class=function () {}class.extend=function (props) { //inherits the parent var prototype=object.create (This.prototype) Initialization function ctor var _class=function () { if (this.ctor)

Learn how common array functions-map () and filter ()-is syntactic sugar for reduce operations. Learn how to using them, how to compose them, and how with reduce can give you a big performance boost over composing filte RS and maps over a large data

JavaScript Object-Oriented Programming Guide note (ii):1, if the function does not show the return value, the default return value is undefined;2. Arguments.length indicates the number of arguments received when the function is called, array

The function of querying parameters + list parameters is often done in development, and these functions are sometimes required to provide a function point for exporting Excel or with hyperlinks to other detail pages.In some highly interactive

Dom is the document.Compatibility conditions-ie6~8 10%-chrome 60%-ff 99%DOM nodeChild nodes-childnodes contains text nodes and ELEMENT nodes//ie6-8ABCDE text node ABCD element node -nodetype return node typeNodeType = = 3 Text nodeNodeType = = 1

/** * Created by Caoke on 2015/11/21. *///two fork tree feature parent node is smaller than child node Var tree2=function () {//Initialize sub-elements of binary tree this.children=[];} tree2.prototype={size:0, Push:function (x) {var arr=this.

The artistic conception of ZenZen, it is necessary to understand the true meaning of the JavaScript technology, to reach the realm of understanding is not easyThe Zen of programming is a kind of realm, must put down the mentality, learns to lay down

What is the JS event stream The early IE events were propagated from top to bottom, that is, from document to target element, while Netscape Company's Netscape Navigator spread in the opposite direction,That is, starting from the target element

1. about how to execute JavaScript code: The first approach is to place JavaScript code between Mark-up goes here. best practice is to put the lennon["Age"]=23;lennon["year"]=1992;6, about objects (similar to arrays): The curly brace method for

The tragedy caused by this scope in js function MultiTimeOut(count, timer, cb){var c = count > 1 ? count : 1var s = falsethis.run = function(){if(c > 0 && !s){cb()c--setTimeout(this.run, timer)}}this.stop = function(){s = true}this.reset = function()

Html and css Basics Background: Recently, the company developed BS architecture projects. The company's main business is not engaged in BS development. There is no project manager, no artist, no front-end, and the interface is ugly. Hahaha Then,

Jquery-1.9.1 source code analysis series (11) DOM operations, jquery-1.9.1dom DOM operations include append, prepend, before, after, replaceWith, appendTo, prependTo, insertBefore, insertAfter, and replaceAll. Its core processing function is

HTML5 Shiv perfectly solves the problem that IE (IE6/IE7/IE8) is not compatible with HTML5 labels. The Semantic tags and attributes of HTML5 make it easy for developers to easily achieve a clear web page layout. With the help of CSS 3 rendering, it

The JavaScript asynchronous control library written by Douglas Crockford: RQ (below)RQ Library The RQ Library RQIt is just a file, rq. js. CreateRQ Variable, which contains four functions. RQIs delivered as a single file, rq. js. When run, it

Ie8 hack, ie8 1. '\ 9 ': Eg:. test {color/* \ **/: blue \ 9}. Header {width: 300px;}/* all browsers */. Header {width/* \ **/: 330px \ 9;}/* all IE browsers */. Header {* width: 310px;}/* IE7 and IE6 can be identified, and IE8 and FF cannot be

How to use JavaScript to obtain browser Information Window has a navigator object to let us know all the information about the browser. We can use a series of API functions to know the information about the browser. The JavaScript code is as follows:

Jquery background follows the mouse sliding navigation, jquery background follows the sliding This example describes the special effect code of the vertical jQuery menu navigation that supports sliding up and down of background images. The details