HTML web storage; better than cookies. What is HTML Web Storage? With web storage, web applications can store data locally within the user’s browser. Before HTML5, application data had to be stored in cookies, included in every server request. Web storage is more secure, and large amounts of data can be stored locally, without affecting […]
The HTML <canvas> element is used to draw graphics on a web page. The graphic to the left is created with <canvas>. It shows four elements: a red rectangle, a gradient rectangle, a multicolor rectangle, and a multicolor text. What is HTML Canvas? The HTML <canvas> element is used to draw graphics, on the fly, via JavaScript. The <canvas> element is only […]
New Elements in HTML5 Below is a list of the new HTML5 elements, and a description of what they are used for. New Semantic/Structural Elements HTML5 offers new elements for better document structure: Tag Description <article> Defines an article <aside> Defines content aside from the page content <audio> Defines sound content <bdi> Isolates a part […]
What is New in HTML5? The DOCTYPE declaration for HTML5 is very simple: <!DOCTYPE html> The character encoding (charset) declaration is also very simple: <meta charset=”UTF-8″> HTML5 Example: <!DOCTYPE html> <html> <head> <meta charset=”UTF-8″> <title>Title of the document</title> </head><body> Content of the document…… </body></html> Try it Yourself » The default character encoding in HTML5 is UTF-8. New HTML5 Elements […]
Not Supported in HTML5 Example An acronym is marked up as follows: Can I get this <acronym title=”as soon as possible”>ASAP</acronym>? Try it Yourself » Definition and Usage The <acronym> tag is not supported in HTML5. Use the <abbr> tag instead. The <acronym> tag defines an acronym. An acronym must spell out another word. For example: NASA, ASAP, GUI. […]
Strong Object The Strong object represents an HTML <strong> element. Access a Strong Object You can access a <strong> element by using getElementById(): Example var x = document.getElementById(“myStrong”); Try it Yourself » Create a Strong Object You can create a <strong> element by using the document.createElement() method: Example var x = document.createElement(“STRONG”); Try it Yourself » Standard […]
Example Format text in a document: <kbd>Keyboard input</kbd> Try it Yourself » Definition and Usage The <kbd> tag is a phrase tag. It defines keyboard input. Tip: This tag is not deprecated, but it is possible to achieve richer effect with CSS. All phrase tags: Tag Description <em> Renders as emphasized text <strong> Defines important text […]
Example Define the title of a work with the <cite> tag: <p><cite>The Scream</cite> by Edward Munch. Painted in 1893.</p> Try it Yourself » Definition and Usage The <cite> tag defines the title of a work (e.g. a book, a song, a movie, a TV show, a painting, a sculpture, etc.). Note: A person’s name is not the […]
Example Draw a red square, on the fly, and show it inside the <canvas> element: <canvas id=”myCanvas”></canvas> <script> var canvas = document.getElementById(“myCanvas”); var ctx = canvas.getContext(“2d”); ctx.fillStyle = “#FF0000”; ctx.fillRect(0, 0, 80, 80); </script> Try it Yourself » Definition and Usage The <canvas> tag is used to draw graphics, on the fly, via scripting (usually JavaScript). The <canvas> tag is only a container […]
Aside Object The Aside Object is new in HTML5. The Aside object represents an HTML <aside> element. Note: The <aside> element is not supported in Internet Explorer 8 and earlier versions. Access an Aside Object You can access an <aside> element by using getElementById(): Example var x = document.getElementById(“myAside”); Try it Yourself » Create an Aside Object […]
Article Object The Article Object is new in HTML5. The Article object represents an HTML <article> element. Note: The <article> element is not supported in Internet Explorer 8 and earlier versions. Access an Article Object You can access an <article> element by using getElementById(): Example var x = document.getElementById(“myArticle”); Try it Yourself » Create an Article Object […]
Example <!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 <!DOCTYPE> declaration must be the very first thing in your HTML document, before the <html> tag. The <!DOCTYPE> declaration is not an HTML tag; it is an instruction to the web browser […]
Style Guide and Coding Conventions HTML Coding Conventions Web developers are often uncertain about the coding style and syntax to use in HTML. Between 2000 and 2010, many web developers converted from HTML to XHTML. With XHTML, developers were forced to write valid and “well-formed” code. HTML5 is a bit more sloppy when it comes […]
XHTML is HTML written as XML. What Is XHTML? XHTML stands for EXtensible HyperText Markup Language XHTML is almost identical to HTML XHTML is stricter than HTML XHTML is HTML defined as an XML application XHTML is supported by all major browsers Why XHTML? Many pages on the internet contain “bad” HTML. This HTML code works fine in […]
The HTML <p> element defines a paragraph: Example <p>This is a paragraph.</p> <p>This is another paragraph.</p> Try it Yourself » Note: Browsers automatically add some white space (a margin) before and after a paragraph. HTML Display You cannot be sure how HTML will be displayed. Large or small screens, and resized windows will create different results. With HTML, you […]
Don’t worry if these examples use tags you have not learned. You will learn about them in the next chapters. HTML Documents All HTML documents must start with a document type declaration: <!DOCTYPE html>. The HTML document itself begins with <html> and ends with </html>. The visible part of the HTML document is between <body> and </body>. Example <!DOCTYPE html> <html> <body> <h1>My […]
What is HTML? HTML is the standard markup language for creating Web pages. HTML stands for Hyper Text Markup Language HTML describes the structure of Web pages using markup HTML elements are the building blocks of HTML pages HTML elements are represented by tags HTML tags label pieces of content such as “heading”, “paragraph”, “table”, […]
