HTML Plug-ins
Plug-ins are computer programs that extend the standard functionality of the browser.
Plug-ins
Plug-ins were designed to be used for many different purposes:
To run Java applets
To run Microsoft ActiveX controls
To display Flash movies
To display maps
To scan for viruses
To verify a bank id
Warning !
Most browsers no longer support Java Applets and Plug-ins.
ActiveX controls are no longer supported in any browsers.
The support for Shockwave Flash has also been turned off in modern browsers.
The <object> Element
The <object> element is supported by all browsers.
The <object> element defines an embedded object within an HTML document.
It was designed to embed plug-ins (like Java applets, PDF readers, and Flash Players) in web pages,
but can also be used to include HTML in HTML:
Example
<object width="100%" height="500px" data="snippet.html"></object>
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Or images if you like:
Example
<object data="audi.jpeg"></object>
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The <embed> Element
The <embed> element is supported in all major browsers.
The <embed> element also defines an embedded object within an HTML document.
Web browsers have supported the <embed> element for a
long time. However, it has not been a part of the HTML
specification before HTML5.
Example
<embed src="audi.jpeg">
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Note that the <embed> element does not have a closing tag. It can not
contain alternative text.
The <embed> element can also be used to include HTML in HTML:
Example
<embed width="100%" height="500px" src="snippet.html">
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Reference: https://www.w3schools.com/html/html_object.asp