karma js tutorial

the beginning of the design, in order to facilitate learning for beginners, does not require the use of VAR declaration variables. This design error has serious consequences: If a variable is used without a var declaration, the variable is automatically declared as a global variable:i = 10; // i现在是全局变量In different JavaScript files on the same page, if you do not have var to declare it, the variables i will be used, causing i the variables to interact with each other, resulting in hard-to-debug

CSS and JS are two ways to implement the accordion folding menu. css tutorial CSS3 exploitation: target pseudo class implementation. Accordion h3 + div {height: 0; overflow: hidden;/* Hide the excess part */transition: height 0.3 s hide-in;/* a special effect to expand, take 0.3s to fly slowly */}. accordion: target h3 + div {height: 300px; overflow: auto;/* automatically hide excess parts */}View Code

resides6Path: __dirname + '/dist ',//output path, to use absolute path7FileName: ' Index.bundle.js '//file name of the output after packaging8 }9};After the configuration file is written, execute the webpack Package command and go to the current directory to find the Webpack.config.js file and package the Main.js file to dist/ Index.bundle.js, if main.js enter the following code, then execute Webpack package once1 function say () {2 alert (' Ghostwu tells you how to learn Webpack ' ); 3

Because of the project needs, the need to get a text editor on the PC page, and the user input content format completely passed to the background to display on another page;Try a few plug-ins feel or wangeditor good, use it relatively simple, the following I will meet today's pits are displayed, see this blog you must be very luckyBecause you can immediately get started with this plug-in, good nonsense not much to say;1 Official website Download plugins need CSS and

In sequence js,the javascript make load CSS definitation and make animation.1.Start State#sequence . Slide-content { z-index:2; Left :%; font-size: +px; opacity: 1; color: #000; width:%; }2.Medium State (constant)/*medium constant state*/#sequence . Animate-in . Slide-content { z-index:2 ; width:% ;Left :0 ; opacity: 1 ; color:#fff ; -webkit-transition-duration: 1s ; -moz-transition-duration: 1s ; -ms-transition-duration: 1s ; -o-

returns always False, not an errorFor example:var result = Window.matchmedia ("screen (min-width:600px)");Console.log (Result.media);//"(min-width:600px)"Console.log (result.matches);//truethe Mediaquerylist object returned by the Matchmedia method has two methods to listen for events: AddListener and RemoveListenerMql.addlistener (mqcallback);Mql.removelistener (mqcallback);Note that the specified callback function mqcallback is called only when the Mediaquery query result changes, so if you w

Spent a morning reading [reprint]node Getting Started» A comprehensive node. JS TutorialAccording to the inside of the demo itself manual implementation process or need to write questions, special finishing in this.(1) One is the directory that adds node.exe on path C:\Program Files\nodejs, (added automatically)(2) One is to increase the environment variable Node_path, the value is C:\Program files\nodejs\node_modules (the environment variable does no

Reading this article needs a little about the basic use of canvas, the example of this article for you to share the HTML5 canvas implementation of the circular clock simple tutorial Step One: create a new, simplest HTML file and define the element canvas in the Canvas.html After this step is done, open the canvas.html in a browser and you will find that nothing is visible because we do not draw anything on the canvas, nor do we define

JS Getting Started Tutorial one (the role of web effects in AJAX example) A simple multiplication table to add annotations to achieve the 99 multiplication table JS uses logical expression examples

Article Introduction: JS in Browser Compatibility Tutorial: Dom method and object reference. 1. getElementById "Analysis Notes" to first look at a set of code:Value= "Click Me" ōnclick= "alert (id.value)"/> In Firefox, the button does not respond, in IE, you can, because for IE, the ID of an HTML element can be used directly in the script as a variable name, but not in Firefox. "Compatibility p

This article for H5EDU institutions official HTML5 training courses, the main Introduction: JavaScript reinforcement tutorial-Cocos2d-JS screen adaptation solution 1. set the screen adaptation policy (ResolutionPolicy) If you have not... this article is H5EDU official HTML5 training courses, mainly introduces: JavaScript reinforcement tutorial-Cocos2d-

an event,It is the things that you are going to do and the things that you are facing.Does Mia have a behavior for the event Mia is alive? So, in the page, controlling The behavior of Mia (how to respond to events) is the function in JS function. Below, Mia takes a conversation with Dear bia as our first js Tutorial Case- "Dear, Let's have a chat. " BIA

Recently working on a WEB project. You need to call OCX to connect the card Reader. Didn't want to use OCX technology. Because the ActiveX technology is produced by microsoft. This causes the entire system to use only IE browser (other browsers can support OCX calls via plugins). But trying a very many method calls client DLL discovery is not going to make Sense. Finally helpless under, only then intends to study the OCX technology. The internet says that ActiveX technology is very troublesome

initialization uses false to initialize the dance property in the parent class. Therefore, print to false in line code. This simple JavaScript inheritance method actually implements the inheritance and polymorphism mechanism of object-oriented concept in the general sense. This simple JavaScript inheritance approach is at the heart of the Cocos2d-js inheritance mechanism, and COCOS2D-JS is slightly modifie

, Balabala .... This passage describes the basic function of Requirejs "modular loading", what is modular loading? We're going to explain one by one of the space that follows.Let's take a look at a common scenario and explain how to use Requirejs with examples.Normal Writing methodIndex.html: Body A.js:function fun1() { alert("It Works");} fun1(); Maybe you'd prefer to write like this.(function() { function fun1() { alert("It Works"); fun1();}) ()The second method uses t

, combined. Net/java, not really, combined with JavaScript to understand is OK. How the function pass lets the HTTP server work:Look back at our 3rd section. Create an HTTP server:1 var http = require ("http"); 2 3 http.createserver (function(request, Response) {4 response.writehead (200 , {"Content-type": "Text/plain"}); 5 Response.Write ("Hello world!" ); 6 Response.End (); 7 }). Listen (88);Here we use the HTTP object createserver to create the server, we pass in a request w

Leadership to find a conversation, the company is not mixed, said to think clearly after the direction of development what. Just think of node. js.First of all, look at the introduction, the general understanding of node. js, Baidu Search is indeed a lot of chaos, feeling or know the point. Attach the known topic node. JS Address: https://www.zhihu.com/topic/19569535Then I found a novice

For more information about how to use jsdatetime, see. The Code is as follows: // Convert a Date string such as "10:18:30" to a Date objectVar strArray = str. split ("");Var strDate = strArray [0]. split ("-");Var strTime = strArray [1]. split (":");Var a = new Date (strDate [0], (strDate [1]-parseInt (1), strDate [2], strTime [0], strTime [1], strTime [2]) 2: The second method is really simple. Var s = "09:41:30 "; Var d = new Date (Date. parse (s. replace (/-/g ,"/"))); -------------------

ument. getElementById (); obtain the html element in the subwindow object 2) reference the parent window in the Child Window Code in the subwindow: Using metadata opener.doc ument. getElementById (); obtain the html element in the parent window Window. opener: refers to the reference to the parent window object of the current window, indicating the window object of the parent window # P # php tutorial-javascript programming-bom in

JavaScript: several methods for JS to obtain HTML elements in a webpage. Javascript tutorial GetElementById getElementsByName getElementsByTagName GetElementById, getElementsByName, getElementsByTagName The last two are the collection, and the byid is only a single object. GetElementById usage For example: Taoba Reference Method on the same page: 1. Use id: Link1.href, return a http://homepage.yesky.com 2