JavaScript

First, the prototype inheritanceThe inheritance model was proposed by Douglas Rockford in 2006 to implement the method of inheritance.The basic idea of a pattern: a prototype allows you to create new objects based on existing objects without having

IO functor doesn ' t like maybe (), either () functors. Instead of Get a value, it takes a function.Api:. Toio () // conver a function to IO//io are lazy, just like Observable, if you D On ' t run it, it has no side effectExamples:/*Cover to

MethodGetelementsbyname () Gets the namegetElementsByTagName () Gets the elementGetAttribute () Get element propertiesSetAttribute () setting element propertiesChildNodes () Access child nodesParentNode () Accessing the parent nodecreateelement ()

First, BOM object1.window Object--Represents the entire browser windowCommon methods:A) alert ()--System message boxAlert (' HelloWorld ');b) Confirmation dialog box--confirm ()Confirm ("OK to delete)The method returns a Boolean value, and if

Either Functor:// API // Resolve the value// return error messageExamples: Map (function (x) {return x + 1 ;}, Right (2 // => Right (3) map (function (x) { return x + 1 // Span style= "color: #008000;" >=> left (' some message ') var

1.objectThe Var person={};//is the same as the new Object ()General creation of objectsvar person=new Object ();p Erson. Name= "admin";JSON Way to createvar person={ Name: "admin", age:23 };Object is passed as a parameterfunction Getperson

varUrltools = { //get Rul parameter valueGeturlparam:function(name) {/*? videoid=identification*/ varparams = decodeURI (Window.location.search);/*intercept? After the part index.html?act=doctor, the truncated string is? Act=doctor*/

for-in statementsThe for-in statement is an iterative statement used to enumerate object properties, Syntax:For (property in expression) statementInstance:for (var propname in window) {document.write (propname);}Understanding ParametersThe

Problem: JS Manually enter a number of spaces, only to display a single spacedocument.write (" 1 2 3 "1 2 3WORKAROUND: 1. Use the output HTML tag document.write ("" + "1" + "" + "up to"); Results: 1 232. Using CSS

The Window.frames property is a collection of all frames for the current page. Note that there is no frame and IFRAME to make a distinction. Also, the Window.frames property always exists, regardless of the frame in which the page exists, and always

var agent = Navigator.userAgent.toLowerCase (),browserversion = null,browserset = [' Msie ', ' Chrome ', ' Firefox ', ' Safari '];Browserset.foreach (function (item) {//eg:in Chrome, Navigator.useragent is "mozilla/5.0 (Windows NT 6.1; WOW64)

1. ECMA-262 defines an object as a collection of unordered properties whose properties can contain basic values, objects, and functions. Each object is created based on a reference type.2. There are two types of attributes: Data properties and

The Window.historys property allows us to manipulate visited pages in the same browser, for example, we can see the number of pages we have browsed before:Window.history.lengthDue to privacy protection, we are unable to obtain the specific URLs of

BOM Browser Object ModelBOM (browser Object model), which provides an object to interact with a browser windowfirst, Window ObjectThe Window object represents the entire browser window.1. System message box alert ()Alert (' Hello world! ‘);2.

Window object1. Window ObjectThe Window object is the core of the bom, and the Window object refers to the current browser windowAll JS global objects, functions, and variables automatically become members of the Window objectA global variable is a

[Note] CSS style declaration sequence and css style declaration Sequence From the Bootstrap Chinese network programming Specification The relevant attribute Declaration should be a group and arranged in the following order: . Declaration-order {/*

Common meta sorting and meta sorting Tags provide metadata about HTML documents. Metadata is not displayed on the page, but is readable to machines. It can be used in browsers (how to display content or reload pages), search engines (keywords), or

Position positioning, position Position indicates the position, orientation, position, position, attitude, and status; It has four values for positioning: absolute and fixed, and relative. There is also a default value static, but it is not located.

Recognize position and position In html, there are two ways to change the layout: float and position. Today I will explain what position is. Position is a very important attribute in CSS. Through the position attribute, we can offset an element

The reason why the label cannot be clicked is summarized. The reason why a label a cannot be clicked is set after the element is absolutely located: 1. No content in the element 2. The background is transparent and there is no background image or