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.
Comparison of Canvas and SVG:
Canvas SVG Resolution dependent No support for event handlers Poor text rendering capabilities You can save the resulting image as .png or .jpg Well suited for graphic-intensive games Resolution independent Support for event handlers Best suited for applications with large rendering areas (Google Maps) Slow rendering if complex (anything that uses the DOM a lot will be slow) Not suited for game applications
<svg width="400" height="180"> <rect x="50" y="20" rx="20" ry="20" width="150" height="150" style="fill:red;stroke:black;stroke-width:5;opacity:0.5" /> </svg>
Utilitzant SVG i Sliders: