Showing posts with label html5. Show all posts
Showing posts with label html5. Show all posts
Tuesday, September 6, 2016
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HTML5 drag and drop functionality to achieve the code
This article is reproduced from http://www.html5website.com/html5-drag-and-drop-functionality-to-achieve-the-code/
http://www.html5website.com/html5-drag-and-drop-functionality-to-achieve-the-code
http://www.html5website.com/html5-drag-and-drop-functionality-to-achieve-the-code
In HTML5, drag and drop is part of the standard,any element can be draggable,details are asfollows:
1.Drag and drop
XML/HTML Code
<!DOCTYPE HTML>
<html>
<head>
<style type=”text/css”>
#div1 {width:350px;height:70px;padding:10px;border:1px solid #aaaaaa;}
</style>
<script>
function allowDrop(ev)
{
ev.preventDefault();
}
function drag(ev)
{
ev.dataTransfer.setData(“Text”,ev.target.id);
}
function drop(ev)
{
ev.preventDefault();
var data=ev.dataTransfer.getData(“Text”);
ev.target.appendChild(document.getElementById(data));
}
</script>
</head>
<body>
<p>drag and drop W3CSchool.cc pictures to the rectangular box :</p>
<div id=”div1″ ondrop=”drop(event)” ondragover=”allowDrop(event)”></div>
<br>
<img id=”drag1″ src=”/images/logo.png” draggable=”true” ondragstart=”drag(event)” width=”336″ height=”69″>
</body>
</html>
2.Set elements can be draggable
First of all, in order to make the elements can be dragged,set the draggable property to true:<img draggable=”true”>
3.Drag what – ondragstart and setData ()
Then, when the element being dragged, what will happen. In the above example,the ondragstart property calls a function, drag (event),it specifies the data to be dragged.DataTransfer.setData () method sets the data type and value of the drag data:
JavaScript Code
function drag(ev)
{
ev.dataTransfer.setData(“Text”,ev.target.id);
}
In this case, the data type is the “Text”, the value is draggable element id (“drag1”).
4.Where to put – ondragover
Ondragover event specified where to place the data being dragged.By default, data / elements cannot be placed into other elements.If you need to set up to allow placement,we must prevent the default processing of elements.This is by calling the ondragover event’s event.preventDefault () method:event.preventDefault()
5.To place – ondrop
When the drag data is placed,the drop event will happen.In the above example,ondrop attribute calls a function, drop (event):drop(event)：
JavaScript Code
function drop(ev)
{
ev.preventDefault();
var data=ev.dataTransfer.getData(“Text”);
ev.target.appendChild(document.getElementById(data));
}
Code explanation:
Call preventDefault () to avoid the default browser for data processing (The default behavior of the drop event is open in the form of links).Get dragged data through the dataTransfer.getData ( “Text”) method.This method is returns the setData () method is set to the same type of any data. Drag data is the id (“drag1”) of the drag element.The dragged element added to the placement element (target element).
This article is reproduced from http://www.html5website.com/html5-drag-and-drop-functionality-to-achieve-the-code/
http://www.html5website.com/html5-drag-and-drop-functionality-to-achieve-the-code
1.Drag and drop
XML/HTML Code
<!DOCTYPE HTML>
<html>
<head>
<style type=”text/css”>
#div1 {width:350px;height:70px;padding:10px;border:1px solid #aaaaaa;}
</style>
<script>
function allowDrop(ev)
{
ev.preventDefault();
}
function drag(ev)
{
ev.dataTransfer.setData(“Text”,ev.target.id);
}
function drop(ev)
{
ev.preventDefault();
var data=ev.dataTransfer.getData(“Text”);
ev.target.appendChild(document.getElementById(data));
}
</script>
</head>
<body>
<p>drag and drop W3CSchool.cc pictures to the rectangular box :</p>
<div id=”div1″ ondrop=”drop(event)” ondragover=”allowDrop(event)”></div>
<br>
<img id=”drag1″ src=”/images/logo.png” draggable=”true” ondragstart=”drag(event)” width=”336″ height=”69″>
</body>
</html>
2.Set elements can be draggable
First of all, in order to make the elements can be dragged,set the draggable property to true:<img draggable=”true”>
3.Drag what – ondragstart and setData ()
Then, when the element being dragged, what will happen. In the above example,the ondragstart property calls a function, drag (event),it specifies the data to be dragged.DataTransfer.setData () method sets the data type and value of the drag data:
JavaScript Code
function drag(ev)
{
ev.dataTransfer.setData(“Text”,ev.target.id);
}
In this case, the data type is the “Text”, the value is draggable element id (“drag1”).
4.Where to put – ondragover
Ondragover event specified where to place the data being dragged.By default, data / elements cannot be placed into other elements.If you need to set up to allow placement,we must prevent the default processing of elements.This is by calling the ondragover event’s event.preventDefault () method:event.preventDefault()
5.To place – ondrop
When the drag data is placed,the drop event will happen.In the above example,ondrop attribute calls a function, drop (event):drop(event)：
JavaScript Code
function drop(ev)
{
ev.preventDefault();
var data=ev.dataTransfer.getData(“Text”);
ev.target.appendChild(document.getElementById(data));
}
Code explanation:
Call preventDefault () to avoid the default browser for data processing (The default behavior of the drop event is open in the form of links).Get dragged data through the dataTransfer.getData ( “Text”) method.This method is returns the setData () method is set to the same type of any data. Drag data is the id (“drag1”) of the drag element.The dragged element added to the placement element (target element).
This article is reproduced from http://www.html5website.com/html5-drag-and-drop-functionality-to-achieve-the-code/
http://www.html5website.com/html5-drag-and-drop-functionality-to-achieve-the-code
HTML5 code
HTML5 drag and drop
In fact, HTML5 is not just down the development of HTML, which includes a set of CSS and JavaScript, a combination of traditional html5 website templates technology, which has increased the new labels and new elements, some animation and other aspects of CSS, all of these are the HTML5 drag and drop definition widely, not only on a narrow understanding of the HTML5. http://www.html5website.com/html5-drag-and-drop-functionality-to-achieve-the-code
Monday, September 5, 2016
html5 mobile template download
For users, see the html5 ecommerce website templates is no longer limited to a simple page display, but a more comprehensive function of the App, it contains more interactive features. For third party developers, abandon the native applications, focus on doing html5 mobile template free download applications, more easily than ever. And for businesses, marketing will become more relaxed, the docking between the enterprise and the user will be more easy. Of course, there is also a QQ browser can not be. http://www.html5website.com/html5-mobile-template-free-download/
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Sunday, September 4, 2016
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Chrome will steering to HTML5 in December
This article is reproduced from http://www.html5website.com/chrome-will-steering-to-html5-in-december/
http://www.html5website.com/chrome-will-steering-to-html5-in-december
Google said,from the beginning of the Chrome 53 in September 2016,Chrome browser will shield in the background loading of Flash content,estimate this type of content accounted for 90% of Flash content on the Internet.In December,Chrome will set the HTML5 as the core content of the web page,Such as the default option for games and videos,except only supports Flash web site.
Flash has always been the default integration in the Google browser,but its importance is gradually being weakened.This is mainly due to the information security issues brought by Flash.In September 2015,Chrome 45 to start the suspension automatically load the unimportant Flash content,including advertising, animation, and any “non Web Page Center” content.
In addition, Mozilla and Microsoft are also gradually abandoned Flash.The ultimate goal of these browser vendors is to allow as many sites steering to HTML5.html5 website templates premium technology can bring better performance (reduce memory consumption and CPU utilization percentage, improve battery life),at the same time also more in line with web page standards (this will make the developer’s job easier).And considering the problem of FLASH information security,steering HTML5 test indexedDB will also optimize security.
This article is reproduced from http://www.html5website.com/chrome-will-steering-to-html5-in-december/
http://www.html5website.com/chrome-will-steering-to-html5-in-december
http://www.html5website.com/chrome-will-steering-to-html5-in-december
Google said,from the beginning of the Chrome 53 in September 2016,Chrome browser will shield in the background loading of Flash content,estimate this type of content accounted for 90% of Flash content on the Internet.In December,Chrome will set the HTML5 as the core content of the web page,Such as the default option for games and videos,except only supports Flash web site.
Flash has always been the default integration in the Google browser,but its importance is gradually being weakened.This is mainly due to the information security issues brought by Flash.In September 2015,Chrome 45 to start the suspension automatically load the unimportant Flash content,including advertising, animation, and any “non Web Page Center” content.
In addition, Mozilla and Microsoft are also gradually abandoned Flash.The ultimate goal of these browser vendors is to allow as many sites steering to HTML5.html5 website templates premium technology can bring better performance (reduce memory consumption and CPU utilization percentage, improve battery life),at the same time also more in line with web page standards (this will make the developer’s job easier).And considering the problem of FLASH information security,steering HTML5 test indexedDB will also optimize security.
This article is reproduced from http://www.html5website.com/chrome-will-steering-to-html5-in-december/
http://www.html5website.com/chrome-will-steering-to-html5-in-december
html5 ecommerce website templates
Saturday, September 3, 2016
About the problem of video, audio tags and progress bar in Html5
This article is reproduced from http://www.html5website.com/about-the-problem-of-video-audio-tags-and-progress-bar-in-html5/
http://www.html5website.com/about-the-problem-of-video-audio-tags-and-progress-bar-in-html5/
In recent projects using video and audio tags of Html5 to play online video and audio files,encountered a problem that is after the play on the page,displayed progress bar is invalid.
When I check the w3c, find the HTML code is no problem.Then I thought of a way, that is, if the static html using the video tag displays the local file progress bar maybe can use it?
When I tried it, I found that really can be use.Then F12 View playback local video playback and play project network response,what is the difference between them?I found that the response header have more things,Then add these things one by one to the backend code, and finally succeeded!
JavaScript Code
response.setHeader(“Cache-Control”,”max-age=31536000, must-revalidate”);
response.setHeader(“Content-Length”, file.length() + “”);
if (fileName.contains(“.mp4”)) {
response.setContentType(“video/mpeg4”);
}
if (fileName.contains(“.mp3”)) {
response.setContentType(“audio/mpeg”);
response.setHeader(“Accept-Ranges:”, “bytes”);
This article is reproduced from http://www.html5website.com/about-the-problem-of-video-audio-tags-and-progress-bar-in-html5/
http://www.html5website.com/about-the-problem-of-video-audio-tags-and-progress-bar-in-html5/
http://www.html5website.com/about-the-problem-of-video-audio-tags-and-progress-bar-in-html5/
In recent projects using video and audio tags of Html5 to play online video and audio files,encountered a problem that is after the play on the page,displayed progress bar is invalid.
When I check the w3c, find the HTML code is no problem.Then I thought of a way, that is, if the static html using the video tag displays the local file progress bar maybe can use it?
When I tried it, I found that really can be use.Then F12 View playback local video playback and play project network response,what is the difference between them?I found that the response header have more things,Then add these things one by one to the backend code, and finally succeeded!
JavaScript Code
response.setHeader(“Cache-Control”,”max-age=31536000, must-revalidate”);
response.setHeader(“Content-Length”, file.length() + “”);
if (fileName.contains(“.mp4”)) {
response.setContentType(“video/mpeg4”);
}
if (fileName.contains(“.mp3”)) {
response.setContentType(“audio/mpeg”);
response.setHeader(“Accept-Ranges:”, “bytes”);
This article is reproduced from http://www.html5website.com/about-the-problem-of-video-audio-tags-and-progress-bar-in-html5/
http://www.html5website.com/about-the-problem-of-video-audio-tags-and-progress-bar-in-html5/
Friday, September 2, 2016
html5 version free download
HTML5 is actually a collection of technology, not only on the basis of the original HTML5 test plus a few labels. Including new labels,html5 version, Javascript, CSS3, local storage, WebGL and so on.http://www.html5website.com/what-are-the-advantages-of-html5/
smartadmin responsive webapp free download 1.8.2 html5
HTML5 features of the storm surge, the browser must have an efficient graphics engine and scripting engine.HTML5 test needs killer applications to attract and guide the user to upgrade the browser, and ultimately complete the deployment of HTML5 terminal.Flash is a constant in the development of technology, there is a strong flexibility, smartadmin responsive webapp free download 1.8.2 html5 can not completely replace the Flash, many developers will not abandon Flash.http://www.html5website.com/smartadmin-responsive-webapp-free-download-1-8-2-html5/
html5 mobile template
HTML5 is not an urgent need for user applications, more companies are trying to change the strategic needs of the software ecosystem.HTML5 test compatibility in view of the previous performance of the major browsers, to wait and see, not immediately migrate applications.html5 mobile template free download needs a mature and complete development environment, Notepad + browser can not deal with.http://www.html5website.com/html5-mobile-template-free-download/
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