


HTML5 video support detection (check whether the browser supports video playback)_html5 tutorial skills
More and more websites now have Provides video playback (not plug-in). HTML5 provides a standard for displaying video. So how to check whether your browser supports video playback? Let's write an example below.
HTML 5 Video h1>
Check whether your browser supports HTML5 videos:
The following is the js code:
function checkVideo()
{
if(!!document.createElement('video ').canPlayType)
{
//Create video element
var vidTest=document.createElement("video");
//Detect whether the video in ogg format can be played
oggTest= vidTest.canPlayType('video/ogg; codecs="theora, vorbis"');
if (!oggTest)
{
//Detect whether videos in MP4 format can be played
h264Test=vidTest .canPlayType('video/mp4; codecs="avc1.42E01E, mp4a.40.2"');
if (!h264Test)
{
document.getElementById("checkVideoResult").innerHTML="Sorry . No video support."
}
else
{
if (h264Test=="probably")
{
document.getElementById("checkVideoResult").innerHTML="Yes ! Full support!";
}
else
{
document.getElementById("checkVideoResult").innerHTML="Well. Some support.";
}
}
}
else
{
if (oggTest=="probably")
{
document.getElementById("checkVideoResult").innerHTML="Yes! Full support!";
}
else
{
document.getElementById("checkVideoResult").innerHTML="Well. Some support.";
}
}
}
else
{
document.getElementById("checkVideoResult").innerHTML="Sorry. No video support."
}
}
canPlayType method description:
1. Definition: Check whether the browser can play the specified audio/ Video type.
2. Return value:
"probably", indicating that the browser is most likely to support the video or audio.
"maybe" means that the browser may support the video or audio.
"" (empty string), indicating that the browser does not support the video or audio.
Note: Internet Explorer 8 and earlier versions do not support this method.
Syntax: audio|video.canPlayType(type))
Parameter description:
type: the audio or video type to be detected,
Common values: video/ogg; video/mp4; video/webm ; audio/mpeg;audio/ogg;audio/mp4
Common values (including the audio or video codec to detect):
video/ogg; codecs="theora, vorbis"
video/mp4 ; codecs="avc1.4D401E, mp4a.40.2"
video/webm; codecs="vp8.0, vorbis"
audio/ogg; codecs="vorbis"
audio/mp4; codecs=" mp4a.40.5"

MicrodatainHTML5enhancesSEOanduserexperiencebyprovidingstructureddatatosearchengines.1)Useitemscope,itemtype,anditempropattributestomarkupcontentlikeproductsorevents.2)TestmicrodatawithtoolslikeGoogle'sStructuredDataTestingTool.3)ConsiderusingJSON-LD

HTML5introducesnewinputtypesthatenhanceuserexperience,simplifydevelopment,andimproveaccessibility.1)automaticallyvalidatesemailformat.2)optimizesformobilewithanumerickeypad.3)andsimplifydateandtimeinputs,reducingtheneedforcustomsolutions.

H5 is HTML5, the fifth version of HTML. HTML5 improves the expressiveness and interactivity of web pages, introduces new features such as semantic tags, multimedia support, offline storage and Canvas drawing, and promotes the development of Web technology.

Accessibility and compliance with network standards are essential to the website. 1) Accessibility ensures that all users have equal access to the website, 2) Network standards follow to improve accessibility and consistency of the website, 3) Accessibility requires the use of semantic HTML, keyboard navigation, color contrast and alternative text, 4) Following these principles is not only a moral and legal requirement, but also amplifying user base.

The H5 tag in HTML is a fifth-level title that is used to tag smaller titles or sub-titles. 1) The H5 tag helps refine content hierarchy and improve readability and SEO. 2) Combined with CSS, you can customize the style to enhance the visual effect. 3) Use H5 tags reasonably to avoid abuse and ensure the logical content structure.

The methods of building a website in HTML5 include: 1. Use semantic tags to define the web page structure, such as, , etc.; 2. Embed multimedia content, use and tags; 3. Apply advanced functions such as form verification and local storage. Through these steps, you can create a modern web page with clear structure and rich features.

A reasonable H5 code structure allows the page to stand out among a lot of content. 1) Use semantic labels such as, etc. to organize content to make the structure clear. 2) Control the rendering effect of pages on different devices through CSS layout such as Flexbox or Grid. 3) Implement responsive design to ensure that the page adapts to different screen sizes.

The main differences between HTML5 (H5) and older versions of HTML include: 1) H5 introduces semantic tags, 2) supports multimedia content, and 3) provides offline storage functions. H5 enhances the functionality and expressiveness of web pages through new tags and APIs, such as and tags, improving user experience and SEO effects, but need to pay attention to compatibility issues.


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