HTML 4 Vs HTML 5
HTML5 Feature:-
- New parsing rules oriented towards
flexible parsing and compatibility
- New elements – section, video, progress, nav,
meter, time, aside, canvas
- New input attributes – dates and times, email,
url
- New attributes – ping, charset, async
- Global attributes (that can be applied for
every element) – id, tabindex, repeat
- Deprecated elements dropped – center, font,
strike
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HTML
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HTML5
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DOCTYPE is
much longer as HTML4 is based on SGML-based.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD
HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd"> |
DOCTYPE is required to enable standards mode
for HTML documents.
<!DOCTYPE html> |
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Audio and Video are not part of HTML4
specification
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Audio and Videos are integral part of HTML5
specifications e.g. <audio> and <video> tags
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Vector Graphics is possible with the help of
technologies such as VML, Silverlight, Flash etc.
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Vector graphics is integral part of HTML5
e.g. SVG and canvas
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It is almost impossible to get true
GeoLocation of user browsing any website especially if it comes to mobile
devices.
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JS GeoLocation API in
HTML5 helps identify location of user browsing any website (provided user
allows it)
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Browser cache can be used as temporary
storage.
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Application Cache, Web SQL
database and Web
storage is available as client side storage. Accessible using JavaScript interface in HTML5 compliant
browsers.
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Web Sockets are not available. Generally used
mechanisms are long
polling and
streaming.
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Full duplex communication channels can be
established with Server using Web Sockets. Accessible using JavaScript
interface in HTML5 compliant browsers.
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Works with all old browsers
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Most of modern browser have started
supporting HTML5 specification e.g. Firefox, Mozilla, Opera, Chrome,
Safari etc.
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Does not allow JavaScript to run in browser.
JS runs in same thread as browser interface.
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Allows JavaScript to run in background. This
is possible due to JS Web worker API in HTML5
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