HTML Versus XHTML
XHTML is a stricter, more XML-based version of HTML.
What is XHTML?
XHTML stands for EXtensible HyperText Markup Language
XHTML is a stricter, more XML-based version of HTML
XHTML is HTML defined as an XML application
XHTML is supported by all major browsers
XML is a markup language where all documents must be marked up correctly (be "well-formed").
XHTML was developed to make HTML more extensible and flexible to work with other data formats (such as XML). In addition, browsers ignore errors in HTML pages, and try to display the website even if it has some errors in the markup. So XHTML comes with a much stricter error handling 0620120134
How it Works
The controls attribute adds video controls, like play, pause, and volume.
It is a good idea to always include width and height attributes. If height and width are not set, the page might flicker while the video loads.
The source element allows you to specify alternative video files which the browser may choose from. The browser will use the first recognized format.
The text between the video tags will only be displayed in browsers that do not support the video element.
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Quickly and easily clear floated content within a container by adding a clearfix utility. 0620120134
Use screen reader utilities to hide elements on all devices except screen readers.
Input Attributes This chapter describes the different attributes for the HTML form input element.
The value Attribute
The input value attribute specifies an initial value for an input field
Input form* Attributes This chapter describes the different form* attributes for the HTML form input element.
The form Attribute
The input form attribute specifies the form the input element belongs to.
The value of this attribute must be equal to the id attribute of the form element it belongs to.
Scrollspy Automatically update Bootstrap navigation or list group components based on scroll position to indicate which link is currently active in the viewport.
Alerts Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages.