async js tutorial

JavaScript: js Code note (judge the length of textbox and fix the maximum number of characters), Javascript tutorial Untitled Document

I. Methods of UseThe HTML structure of the canvas plugin is very simple, which is to use a tag:You can then invoke the plug-in using the following method:function init () {document.getElementById (' Portrait-image '). Closepixelate ([{resolution:24},{shape: ' Circle ', resolution:24, Size:16, Offset:12, alpha:0.5}]);};Window.addeventlistener (' Load ', init, false);Second, the structure function and the methodvar Img=document.getelementbyid (' portrait-img ');var mypixelation=new closepixelatio

Original addressWe learned about the creation of maps and markers in the front. So today we're going to learn how to display a window on a map (Infowindow)The Infowindow constructor is:Infowindow (opts?:infowindowoptions). The infowindowoptions Object Specifies the initialization parameters that are used to display the information window. Infowindowoptions Object Properties:content: contains a text string or displays a DOM node in the Information window. Pixeloffset: represents the position offs

cookies httpOnly .HistoryhistoryThe object holds the browser's history, and JavaScript can invoke the history object back() or the forward () user clicks the browser's back or forward button.This object belongs to the historical legacy, and for modern web pages, a simple and brutal invocation can be very annoying to users because of the large use of Ajax and page interactions history.back() .When a novice starts designing a Web page, he likes to call when the login page is successful history.ba

Transferred from: http://blog.csdn.net/lulei9876/article/details/8494337When self-study jquery, saw an English word (Callback), immediately back faint cold sweat. Google quickly found that the original Chinese translation into a callback. That is, the callback function. Do not understand Ah, so in the Google callback function, found that the online Chinese interpretation is too "abstruse", I admit that I caishuxueqian. After looking at some examples of callbacks, it seems a bit understandable. H

(‘false‘); // true! ‘false‘字符串转换结果为true！因为它是非空字符串！var b3 = Boolean(‘‘); // falsevar s = String(123.45); // ‘123.45‘typeof s; // ‘string‘Did you feel a big head? This is the hypnotic charm peculiar to JavaScript!To summarize, there are a few rules to follow: Do not new Number() use new Boolean() , new String() create packaging objects; Use parseInt() or parseFloat() to convert any type to number ; The String() method used to convert any type to string , or directly invoke, an obj

pixel px) */@ media (min-width: pixel px ){. text h2 {font-size: 26px ;}. text p {font-size: 18px ;}. tab2-text {float: left ;}. tab2-img {float: right ;}} JS control vertical center $('.text').eq(0).css('margin-top', ($('.auto').eq(0).height() - $('.text').eq(0).height()) / 2 + 'px');$(window).resize(function() { $('.text').eq(0).css('margin-top', ($('.auto').eq(0).height() - $('.text').eq(0).height()) / 2 + 'px');});$('.text').eq(1).css('margin-

1. Uppercase,lowercase Case Conversion{{' lower cap string '|}} //Result: LOWER CAP STRING{{"TANK is good"|}} //Result: Tank is good 2. Date format{{1490161945000| date:"Yyyy-mm-dd HH:mm:ss"}}//2017-03-22 13:52:25 3, number formatting (keep decimals){{149016.1945000| number:2}} 4. Currency Currency format{{]|}} //Result: $250.00{{] | currency:"Rmb￥"}}//Result: rmb￥250.00 5. Filter LookupInput filters can be added to the directive with a pipe character (|) and a filter followed by a

is an object, then the properties inside the object are allowed to be modified.. cannot be duplicate with other identifiers1 Const user = ' GHOSTWU '; 2 console.log (user); 3 user = ' Zhangsan '; Error, cannot be re-assigned value1 const user; Error, no initial value given at the time of definition Constuser={name : ' GHOSTWU ' }; console.log (user.name);//ghostwu user.name= ' Zhangsan '; properties of //objects allowed to be modified console.log (user.name); //zhangsan Const USER = {name: ' G

Uniform motion: Refers to the movement of an object in a straight line, and the displacement of an object through any equal time interval is equal. In fact, it is uniform motion, it is characterized by an acceleration of 0, from the definition, in any equal time interval, the speed and direction are the same.1238 - to + -The above example lets a small ball with a radius of 20px from x=0, y=canvas the height of half, at 2px per frame speed to the right uniform motion.We can encapsulate the ball i

SMS Verification Code countdown can be very good to avoid frequent user access, usually using the JS implementation to obtain SMS Verification code countdown function, the specific implementation of the following:HTML section:Page effect:JS section:Final implementation effectReproduced in this article: http://www.lx598.com/hangyedongtai/1028.htmlJS implementation to send SMS Verification Code Countdown tutorial