html5 api documentation

Original: HTML5 Learning Series (iv) file operations APIIntroductionBefore we were working on local files using technologies such as flash, Silverlight, or third-party ActiveX plug-ins, it was difficult to achieve uniform performance across platforms, or across browsers, across devices, and so on, by using these technologies. From another point of view, our Web application relies on third-party plugins rather than being independent and generic enough.

Comments: Storing data on the client can solve many problems and reduce unnecessary data transmission: the previous practices of saving the state of a program, caching data, and user preferences are very complicated. Next, I will introduce in detail some of my friends who are interested in it, it may be helpful to youWhy store data to the client? Storing data on the client can solve many problems and reduce unnecessary data transmission:1. Saving the state of the program: the user can close the

ArticleDirectory I. Preface II. Specific Use of fullscreen javascript API Iii. Solutions Iv. Summary V. Reference Documents Note: HTML5 only indicates that it is a new feature. Should browser JavaScript APIs be a complementary feature of HTML5? We don't have to worry about it. Let's take a look at what this interface can bring to me an

JavaScript uses the HTML file API to read files, noting that "read" is read-only and does not take the initiative to get a list of files from the host on which the browser resides. HTML5 in Fileapi mainly have FileUpload, File,FileList,fileerror,Blob,filereader,datatransfer. Here the main test file. It is therefore necessary to give a test target I. FileUploadis the essence of fileinputhtml4.01 and XHTML

defined by HTML5 is also part of the HTML5 WebSockets and HTML5 Web workers.The API used to receive messages in the HTML5 communication function is consistent with the Messageevent interface.　　 XMLHttpRequest Level 2　　 　　cross-Origin xmlhttprequestsCross-origin HTTP request

Javascript HTML5 File Upload FileReader API, html5filereader The file upload function is becoming more and more common. All social websites, media websites, such as Youku videos and Weibo, provide functions such as uploading images and uploading videos. However, in the past, WEB programmers knew that it was very troublesome to upload files using HTML forms. In particular, you would like to know some attribu

; // ...});/ /Once the y-coordinate of the ball is at 75% of the bottom of the screen, the speed of movement to the x-axis changes to 75%, while the y-axis bounces 40% of the previous bounce height. With the Getimagedata method and the Putimagedata method, each pixel can be processed to manipulate the image content. Assuming that filter is a function that handles pixels, the entire process for the canvas can be represented in the following code. if (canvas.width > 0 canvas.height > 0) {var imag

HTML5: Screen Orientation API Media queries allow websites to adjust their la s based on their smartphones and tablets. But sometimes you want the website to be locked to a specific direction, landscape screen or landscape screen. At this time, the format of the native application can be specified. The APP is only displayed in the preset format-independent from the actual device direction. By using the

Upload Image Preview function with HTML5 file API A few days ago to do a project, involving the ability to upload local images, just before the HTML5 can upload local images, and then online to see some of the demo combined with their own needs, finally fix. PS: I have to admit how lazy I am, I always do not take the initiative to learn when there is no

HTML5 uses the constraint verification API to check the code instance of the input data of the form. html5api HTML5 has a great deal of Optimization for forms, whether it is semantics, widgets, or data format validation. I guess you will be reluctant to use these new features on the pretext of browser compatibility, but this should not be the reason for your stag

Added video tags, corresponding attributes, and API details for html5. Knowledge description: Not as good as front-end developers, but from the beginning to the end to understand the "Ten thousand miles from the ground up", the most important basic, HTML5 beginners, solid foundation of the first step, to sort out the most basic, leaving traces of their own learni

First, drag and drop APIWEB Drag and drop-On desktop applications, you can drag and drop elements from one location to another, but on the web, developers do not have a standard technology to do this, so it is not easy to implement this feature on the Web-The drag-and-drop API has been introduced into the HTML5 standard, which makes it possible to develop Web applications that are identical to desktop appli

Comments: When I started learning HTML5, I am very interested in Geolocation. Using Google Map APIs to implement basic Map location functions, I mainly take the following steps: obtain the current geographic location and call the Google Map API to obtain the current location information. This course is just learning HTML5. Now, I am very interested in the Geoloca

ArticleDirectory Introduction Several important JS objects Read the files in the file upload control and display the content in different ways in the browser. Introduction Previously, we used flash, Silverlight, third-party ActiveX plug-ins and other technologies to operate local files, with these technologies, it is difficult to achieve unified performance across platforms, browsers, and devices, from another perspective, our web applications depend on third-party plug-ins,

(window.location) After the change through JavaScript, the browser will be refreshed to reach your changed URL (location is the meaning of the site). )And after JavaScript MVC became popular, the way to modify URLs by refreshing them was annoying. In HTML5, however, an API is developed that allows you to modify the URL in a way that does not refresh the browser, which is the history API.Familiar with the de

HTML5 drag-and-drop API, html5apiDrag and drop eventsEvents provide drag-and-drop control over almost all aspects of drag-and-drop operations. The tricky part is to determine how each event is triggered: when a project is being dragged down, or when others are down. When you drag an item, the following events (in this order ):Drag startDragDragendNow you start by dragging the mouse button and start to move

follows:Drag The preceding example uses the methods and attributes of dataTransfer. Next, let's look at another interesting online application: drag an image to a webpage and display it on the webpage. This application uses the files attribute of dataTransfer.The Code is as follows:In this example, the file reading API in html5 is used: FileReader object, which provides the following asynchronous methods f

HTML5 Geolocation location API usage tutorial, html5geolocation As handheld devices are so common today, location information is extremely important for applications. taxi hailing applications can call nearby vehicles based on users' location information, the Group Buying software can recommend nearby cinemas and foods based on the current location. The map application can quickly plan the route to the dest

HTML5 full screen API details, html5fullscreenThis article mainly introduces the full screen HTML5 API in detail. This article provides sample code for starting full screen mode and exiting full screen mode, and explains the Fullscreen attributes and events, for more information, see JavaScript is becoming more and mor

Lost name body: [Increase decrease] Source: Internet time: 04-24 15:49:31 I want to comment.This article mainly introduces the HTML5 full-screen (fullscreen) API detailed introduction, this article gives the start Full screen mode and exit full Screen mode code example, while explaining the fullscreen properties and events, the need for friends can refer to the nextIn more and more real Web applications, Ja