HTML <optgroup> Attributes

HTML <optgroup> disabled Attribute A disabled option-group: <select> <optgroup label=”German Cars” disabled> <option value=”mercedes”>Mercedes</option> <option value=”audi”>Audi</option> </optgroup> </select> Try it Yourself » Definition and Usage The disabled attribute is a boolean attribute. When present, it specifies that an option-group should be disabled. A disabled option-group is unusable and un-clickable. The disabled attribute can be set to keep a user from selecting […]

HTML <main> Tag

Example <main> <h1>Web Browsers</h1> <p>Google Chrome, Firefox, and Internet Explorer are the most used browsers today.</p><article> <h1>Google Chrome</h1> <p>Google Chrome is a free, open-source web browser developed by Google, released in 2008.</p> </article><article> <h1>Internet Explorer</h1> <p>Internet Explorer is a free web browser from Microsoft, released in 1995.</p> </article> <article> <h1>Mozilla Firefox</h1> <p>Firefox is a free, […]

HTML <i> Tag

Example <p>He named his car <i>The lightning</i>, because it was very fast.</p> Try it Yourself » Definition and Usage The <i> tag defines a part of text in an alternate voice or mood. The content of the <i> tag is usually displayed in italic. The <i> tag can be used to indicate a technical term, a […]

HTML <html> Tag

Example A simple HTML5 document: <!DOCTYPE HTML> <html> <head> <title>Title of the document</title> </head><body> The content of the document…… </body></html> Try it Yourself » Definition and Usage The <html> tag tells the browser that this is an HTML document. The <html> tag represents the root of an HTML document. The <html> tag is the container for […]

HTML <optgroup> Tag

Example Group related options with <optgroup> tags: <select> <optgroup label=”Swedish Cars”> <option value=”volvo”>Volvo</option> <option value=”saab”>Saab</option> </optgroup> <optgroup label=”German Cars”> <option value=”mercedes”>Mercedes</option> <option value=”audi”>Audi</option> </optgroup> </select> Try it Yourself » Definition and Usage The <optgroup> is used to group related options in a drop-down list. If you have a long list of options, groups of related options are easier to handle for […]

HTML <figure> Tag

Example Use a <figure> element to mark up a photo in a document: <figure> <img src=”img_pulpit.jpg” alt=”The Pulpit Rock” width=”304″ height=”228″> </figure> Try it Yourself » Definition and Usage The <figure> tag specifies self-contained content, like illustrations, diagrams, photos, code listings, etc. While the content of the <figure> element is related to the main flow, its position is independent […]

HTML <th> valign Attribute

Example Vertical align the content inside <th> elements: <table> <tr> <th valign=”bottom”>Month</th> <th valign=”bottom”>Savings</th> </tr> <tr> <td>January</td> <td>$100</td> </tr> </table> Try it Yourself » Definition and Usage The valign attribute specifies the vertical alignment of the content in a header cell. Browser Support Attribute valign Yes Yes Yes Yes Yes Compatibility Notes The valign attribute of <th> […]

HTML <th> width Attribute

Example Header cells with a predefined width: <table> <tr> <th width=”70%”>Month</th> <th width=”30%”>Savings</th> </tr> <tr> <td>January</td> <td>$100</td> </tr> <tr> <td>February</td> <td>$80</td> </tr> </table> Try it Yourself » Definition and Usage The width attribute specifies the width of a table header cell. Normally, a cell takes up the space it needs to display the content. The width attribute […]

HTML <th> height Attribute

Example Two header cells with a predefined height: <table> <tr> <th height=”100″>Month</th> <th height=”100″>Savings</th> </tr> <tr> <td>January</td> <td>$100</td> </tr> <tr> <td>February</td> <td>$80</td> </tr> </table> Try it Yourself » Definition and Usage The height attribute specifies the height of a header cell. If no height attribute is set, a header cell takes up the space it needs to […]

HTML <th> abbr Attribute

Example Use of the abbr attribute in an HTML table: <table> <tr> <th abbr=”Make”>Toy manufacturer</th> <th abbr=”Model”>Vehicle model</th> </tr> <tr> <td>Bruder Toys</td> <td>Cross Country Vehicle</td> </tr> <tr> <td>Bruder Toys</td> <td>DHL Lorry</td> </tr> </table> Try it Yourself » Definition and Usage The abbr attribute specifies a shorter version of the content in a header cell. Browser Support Attribute […]

HTML <title> Tag

Example Define a title for your HTML document: <!DOCTYPE html> <html><head> <title>HTML Reference</title> </head> <body> The content of the document…… </body> </html> Try it Yourself » Definition and Usage The <title> tag is required in all HTML documents and it defines the title of the document. The <title> element: defines a title in the browser toolbar […]

HTML <th> Tag

Example A simple HTML table with two header cells and two data cells: <table> <tr> <th>Month</th> <th>Savings</th> </tr> <tr> <td>January</td> <td>$100</td> </tr> </table> Try it Yourself » More “Try it Yourself” examples below. Definition and Usage The <th> tag defines a header cell in an HTML table. An HTML table has two kinds of cells: […]

HTML <map> Tag

Example An image-map, with clickable areas: <img src=”planets.gif” width=”145″ height=”126″ alt=”Planets” usemap=”#planetmap”> <map name=”planetmap”> <area shape=”rect” coords=”0,0,82,126″ href=”sun.htm” alt=”Sun”> <area shape=”circle” coords=”90,58,3″ href=”mercur.htm” alt=”Mercury”> <area shape=”circle” coords=”124,58,8″ href=”venus.htm” alt=”Venus”> </map> Try it Yourself » Definition and Usage The <map> tag is used to define a client-side image-map. An image-map is an image with clickable areas. The required name attribute of the <map> element is associated with the <img>’s usemap attribute and creates a […]

HTML Form

This section will teach you the basics of HTML forms in detail. HTML Forms HTML Forms HTML Form Elements HTML Input Types HTML Input Attributes

HTML <a> shape Attribute

Example Use of the shape and coords attribute in an <a> element, to create an image-map: <object data=”planets.gif” alt=”Planets” type=”image/gif” usemap=”#Map1″> <map name=”Map1″> <a href=”sun.htm” shape=”rect” coords=”0,0,82,126″>The Sun</a> <a href=”mercur.htm”shape=”circle” coords=”90,58,3″>Mercury</a> <a href=”venus.htm” shape=”circle” coords=”124,58,8″>Venus</a> </map> </object> Try it Yourself » Definition and Usage The <a> shape attribute is not supported in HTML5. The shape attribute is used together with the coords attribute to specify the size, shape, and placement […]

HTML Images

Images can improve the design and the appearance of a web page. HTML Images Syntax In HTML, images are defined with the <img> tag. The <img> tag is empty, it contains attributes only, and does not have a closing tag. The src attribute specifies the URL (web address) of the image: <img src=”url“> The alt Attribute The alt attribute provides an alternate text for an […]