HTML5 SVG

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What is Multimedia?

Multimedia comes in many different formats. It can be almost anything you can hear or see.
Examples: Pictures, music, sound, videos, records, films, animations, and more.
Web pages often contain multimedia elements of different types and formats.
In this chapter you will learn about the different multimedia formats.

What is SVG?

  • SVG stands for Scalable Vector Graphics
  • SVG is used to define graphics for the Web
  • SVG is a W3C recommendation

The HTML <svg> Element

The HTML <svg> element (introduced in HTML5) is a container for SVG graphics.
SVG has several methods for drawing paths, boxes, circles, text, and graphic images.

Example

<!DOCTYPE html>
<html>
<body>

<svg width="100" height="100">
  <circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" />
</svg>

</body>
</html>

Differences Between SVG and Canvas

SVG is a language for describing 2D graphics in XML.
Canvas draws 2D graphics, on the fly (with a JavaScript).
SVG is XML based, which means that every element is available within the SVG DOM. You can attach JavaScript event handlers for an element.
In SVG, each drawn shape is remembered as an object. If attributes of an SVG object are changed, the browser can automatically re-render the shape.
Canvas is rendered pixel by pixel. In canvas, once the graphic is drawn, it is forgotten by the browser. If its position should be changed, the entire scene needs to be redrawn, including any objects that might have been covered by the graphic.
 

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