modularization. The previous specification as a module is too large and complex. Therefore, it is divided into small modules and more new modules are also added. These modules include: Box Model, list module, hyperlink mode, language module, background and border, text effects, and multi-column layout.
3) jquery is another excellent protocol Cr protocol PT framework after prototype. It is a lightweight JS Library (only 21 K after compression). It is compatible with css3 and various browsers (I
Javascript API mode: it helps us provide better and cleaner interfaces for functions. These modes mainly include the following: 1) callback mode: The function is also an object, so it can be passed as a parameter. See the following example: function demo01 (callback) {callback ();} function test01 () {console. log ("AAA") ;}demo01 (test01); // "AAA" Let's take a look at the callback and its scope: var myobj
solution launched by Microsoft in the browser World War in the S. It stores local data with the behaviour attribute of DHTML, allowing each page to store up to 64 K data, and each site can store up to k Data, the disadvantage of userData is obvious. It is not part of the Web standard, unless your program only needs to support IE, it is basically useless.3. Flash cookie. Flash cookies are not the same as HTTP cookies. They may be called "Flash local storage". By default, Flash cookies allow each
, because each item has the same name property, only the first item is returned[note] Only Ie8-ie11 browser supportdocument.all ()Before Dom Normalization, IE4 introduced the document.all[] collection to represent the elements in all documentsNow that the Document.all method has been deprecated, to achieve a similar effect, you can use the document.getElementsByTagName (' * ') method, which indicates that all elements are matchedAt lastThe Getelementsbyname () method is not commonly used, plus t
Research on Web worker multi-thread API in JavaScript, workerapi
HTML5 supports APIs such as Web Worker, allowing Web pages to execute multi-threaded code securely. However, Web Worker is actually subject to many restrictions because it cannot truly share memory data and can only use messages for status notifications. Therefore, it cannot even be called a real "multi-thread ".
The Web Worker interface is in
. SceneviewIn the same way, give the full HTML code:DOCTYPE HTML>HTML>Head>MetaCharSet= "Utf-8">Metaname= "Viewport"content= "initial-scale=1, maximum-scale=1, User-scalable=no">title>Get started with sceneview-create a 3D maptitle>style>html, body, #viewDiv{padding:0;margin:0;Height:100%;width:100%; }style>Linkrel= "stylesheet"href= "Https://js.arcgis.com/4.2/esri/css/main.css">Scriptsrc= "HTTPS://JS.ARCGIS.COM/4.2/">Script>Script>require (["Esri/map", "Esri/views/sceneview", "dojo/domready!
If you are not familiar with event events, it is recommended to read my previous text javascript: Understanding DOM events. Or look directly below the worker API.First, we need to instantiate a worker object, and the browser will open a new interface based on the newly created Worker object, which will handle the communication between the client and the INDEXEDDB database. The database here refers to the browser database. If you need to determine whet
Query is one of the common functions of webgis. map-based query has evolved in many forms. Currently, there is no fixed mode for displaying the query in what form, which is suitable for webgis, what forms can meet the needs of applications. For example, to describe the most typical scenario, click the map to display a TIP small window, showing the simple information of the query object, the small window provides a "details" link, click it to display the data card on the webpage. There is also su
1.2. Object does not support the "replace" property or methodSolution: Generally in IE, the implementation of JS will report such errors, the basic problem is that you refer to an object does not exist in the method, it may be that the method exists and you write wrong, or call this method when the illegal parameters, but this is only careless, there is the reason for the name repetition, The custom method name and the original repetition.3.iis HTTP Error 403.14-forbidden Web issueIf the directo
Baidu Map API (JavaScript)--Highlight the selected administrative divisions
var map = new Bmap.map ("Map_container");
function Initmap (map, "Changsha") {var point = new Bmap.point (112.987402, 28.201509); Create point coordinates 112.987402, 28.201509Map.centerandzoom (point, 8); Initializes the map, setting the center point coordinates and the map level.Map.addcontrol (New Bmap.scalecontrol ()); Add a sca
1. Call () and apply (), examples are as follows:function Add (A, B){alert (A+B);}function Sub (A, b){Alert (A-B);}Add.call (sub,3,1);Note: This example means that the sub inherits Add,add.call (sub,3,1) = = Add (3,1), so the result is: alert (4); Note: The function in JS is actually an object, and the function name is a reference to a function object.Note : Replace with sub, which adds an Add method to sub now;i.e. Add.call (sub, 3, 1);EquivalentSub.add = function Add (A, B){alert (A+B);}A diff
Javascript uses call to call API, callapi
The code is very simple. I just want to give you a thought. There is not much nonsense here. Here is the source code:
Copy codeThe Code is as follows:
Here is just an introduction to the idea. Let's take full advantage of the specific friends.
If you are not familiar with event events, it is recommended to read my previous text javascript: Understanding DOM events. Or look directly below the worker API.First, we need to instantiate a worker object, and the browser will open a new interface based on the newly created Worker object, which will handle the communication between the client and the INDEXEDDB database. The database here refers to the browser database. If you need to determine whet
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