What is SVG?
- SVG stands for Scalable Vector Graphics
- SVG is used to define vector-based graphics for the Web
- SVG defines the graphics in XML format
- SVG graphics do NOT lose any quality if they are zoomed or resized
- Every element and every attribute in SVG files can be animated
- SVG is a W3C recommendation
SVG Advantages
Advantages of using SVG over other image formats (like JPEG
and GIF) are:
- SVG images can be created and edited with any text editor
- SVG images can be searched, indexed, scripted, and compressed
- SVG images are scalable
- SVG images can be printed with high quality at any resolution
- SVG images are zoomable (and the image can be zoomed without degradation)
Embed SVG Directly Into
HTML Pages
In HTML5, you can embed SVG elements directly into your HTML
page:
Example
<!DOCTYPE html>
<html>
<body>
<svg width="300" height="200">
<polygon points="100,10 40,180 190,60 10,60 160,180"
style="fill:lime;stroke:purple;stroke-width:5;fill-rule:evenodd;" />
</svg>
</body>
</html>
<html>
<body>
<svg width="300" height="200">
<polygon points="100,10 40,180 190,60 10,60 160,180"
style="fill:lime;stroke:purple;stroke-width:5;fill-rule:evenodd;" />
</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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