karma js tutorial

I. Methods of UseSince Textures.js is based on d3.js, d3.js files must be introduced and textures.min.js files introduced.Second, HTML structureThe HTML structure of the SVG pattern background is very simple, using an empty div element.Third, JavaScriptThe attr property selects the element to make the pattern background and sets its width and height through the properties of the property:var svg = d3.select

[i]; 4 }5 }The above 2 types of arrows are not supported.The builder can be added to the object1 varobj = {2Createiterator:function*(arr) {3 for(vari = 0, len = arr.length; i ) {4 yield arr[i];5 }6 }7 };8 variterator = Obj.createiterator ([10, 20, 30 ] );9Console.log (Iterator.next ());//{done:false, value:10}TenConsole.log (Iterator.next ());//{done:false, value:20} OneConsole.log (Iterator.next ());//{done:false, value:30} AConsole.log (Iterator.next ());//{done:true,

Use PHP + JS to implement automatic search prompts (instances ). I think it is necessary for me to write this tutorial, because most of the applications I have seen about automatic completion only give you a program source code package and then tell you how to use it, instead of telling me that I think it is necessary to write this tutorial, because most of the a

events. # # #如何用leaflet快速加载地图 Introducing CSS Filesrel= "stylesheet" href= "http://cdn.leafletjs.com/leaflet-0.7.3/ Leaflet.css "/>Reference JavaScriptsrc= "Http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js"> Script >Page to add a div container as a mapid= "Map">div>Determine the height of the map container#map {height:180px;} # # # #设置地图 Set the map center and zoom level var map = l.map (' map '). Setview ([51.505, -0.09], +); Add layer l.tilelayer (' http://{s}.tiles.mapbox.com/v

the state of execution, and with this, writing a generator can implement functionality that requires an object-oriented implementation. For example, use an object to save the state, so write:var fib = { a: 0, b: 1, n: 0, max: 5, next: function () { var r = this.a, t = this.a + this.b; this.a = this.b; this.b = t; if (this.n this.max) { this.n ++; return r; } else { return undefined; } }};It is quite tedious to use the properties of the object to save the state.Another great benefit

A lot of webmaster reaction to open the site when there is a http://discuz.gtimg.cn/cloud/scripts/discuz_tips.js?v=1 has been loading, resulting in a slow Web page open, this time you can follow this tutorial to modify the file resolution:Note: This modification involves the modification of the source code, may be invalid after the upgrade, please decide whether to use this tutorialModified files: source/function/function_core.phpOpen File:Found itif

In the Vue. js tutorial, It is very convenient to calculate the inline expression of the attribute Vue. js, but it is most suitable for simple Boolean operations or String concatenation. If more complex logic is involved, you should use the computing attribute. The calculation attribute is used to declare that a value depends on other values. When you bind data

An abstract description of thingsdescribe the characteristics and behavior of such thingsobject is an instance of a classcode implementation: Creating a Classfunctionpeple () {this.hp=0; this.act=30;this.name= "";this.x=0; this.y=0;this.move=function (x, y) { document.write (this.name+ "Moving to" +x+ "," +y "); }this.eat=function () {document.write ("eating"); }}Instance of class: Creating an Objectvar p1 = new Peple ();P1.name= "Ada";P1.HP = 100;P1.move (100,100); P1.move (22,200);[b] Dynamic

Static pages call the user login and exit the login program in real time (js calls the php code ). During program development, pages are often made into static html forms, which can reduce server load. However, when a registered user logs in, to display the html page in program development, the page is often made into a static html form, which can reduce the server load, but there is also a problem that when a registered user logs in, to display the l

Javascript: target nbsp; How to Use nbsp; JS nbsp; to control attributes ?, Javascript tutorial How to Use JS to control the target attribute of a link? The target attribute cannot be used in tags in HTML 4.0 Strict or XHTML 1.0 STRICT. This is a headache for web designers. it is still allowed in the Transition specification. however, we can solve

called a callback function.Perhaps some people have doubts: must be passed in the form of parameters, I can not directly in function A call function B? I can do that. In the solution.The following code is used to confirm my understanding.[HTML]View Plaincopy html> head> title> Callback Function (callback)title> script language="javascript" type="Text/javascript"> Function A (callback) { Alert ("I am the parent function A! "); Alert ("Call callback function");

[Js master path] html5 canvas animation tutorial, Canvas is used to achieve a snowing effect. First, let's preview the effect: First, let's analyze the effect: 1. randomly generate snowflake 2. Snow is not produced at the same time, but in a sequential order. 3. How is snowflake represented? 4. How does one continuously snow? 5. Snow is large and small After figuring out the above issues, this effect is ba

[Js master path] html5 canvas tutorial, html5canvas : Note: 1. Remaining Time Calculation 2. Draw numbers at each time The time is mainly composed of 0-9 and a colon, represented by an array (0: do not draw a circle, 1: Draw a blue circle) Num. js file:1 var digital = 2 [3 [4 [, 0], 5 [,], 6, 1], 7 [, 1], 8 [, 1], 9 [, 1], 10,, 1], 11 [, 1], 12 [,], 13, 0] 14],

[Js master path] html5 canvas animation tutorial, Uniform Motion: refers to the movement of an object in a straight line, and the displacement of the object through any equal time interval is equal. In fact, it is a constant linear motion, which is characterized by a zero acceleration. From the definition, we can see that the speed and direction are the same in any equal time interval. 1 The above example

[Js master path] html5 canvas series tutorial, html5canvas Next, the above line style [js master path] html5 canvas series tutorials-line style (lineWidth, lineCap, lineJoin, setLineDash) continue. Canvas provides two ways to output text: StrokeText: stroke text FillText: Fill text Use fillStyle with fillText and strokeStyle with strokeText Usage of strokeText: C

I. Methods of UseThe Particle animation Library plugin is very simple to use, first to introduce the Particles.js file in the page.Use a div in the page as a container to place particles.You can then invoke the particle plug-in as follows:Particlesjs (' Particles-js ', {Particles: {Color: ' #fff ',Shape: ' Circle ',Opacity:1,Size:4,Size_random:true,nb:150,Line_linked: {Enable_auto:true,DISTANCE:100,Color: ' #fff ',Opacity:1,Width:1,Condensed_mode: {En

This tutorial uses js to implement the effects of switching between multiple images and rotating the end of execution. If you are interested, refer to the following. I hope it will help you learn about js. The Code is as follows:

Construction of Node JS project:To create a standard file structure, you need to download and use the Webstorm software to create a new Node Express project.Operation of App.js:(1) Introduce a new module: var School_controller = require ('./controller/school_controller ');(2) Add a new route: App.use ('/school ', school_controller);Three ways to get parameters:(1) Gets the parameter value of the GET request: Req.query, visit: Http://localhost:3000?q=s

How to get elements in JS:1. Get elements by ID name:Document get element by id ' link 'Docuemnt.getelementbyid (' link ');2......Events: Mouse events, keyboard events, system events, form events, custom events ...OnClickonmouseoveronmouseoutOnMouseDownOnMouseUpOnMouseMove is like a mouse stroke event.......OnLoad executes after loading ...Window.onload = ThingsImg.onloadBody.onload......How to add an event:element. onmouseoverFunction:

This article mainly shares the learning notes on JS plug-in rolling listening in the Bootstrap tutorial. The content is very detailed. Interested friends can refer to this article to learn about the JavaScript plug-in-rolling listening. 1. Case studies The scroll listening plug-in can automatically update the corresponding navigation tag based on the position of the scroll bar. You can scroll through this