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Provide SVG when the browser supports it, else PNG (using CHtml::image overload)
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Provide SVG when the browser supports it, else PNG (using CHtml::image overload)
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Tips
Yii version unchanged
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svg, CHtml::image, images
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Modern browsers support SVG, older browsers do not.
On the first load, it will wrap images in a structure that holds both the SVG and PNG alternative. In that case it is the browser that "selects" the right image.
During that load, the browser will also set a cookie indicating that it supports SVG as an image or not.
On the second load, or for subsequent ajax loads, the cookie will tell if the browser supports SVG for images. So instead of rendering a complex structure, either the SVG is rendered or the PNG is rendered. This is more efficient.
On the first load, it will wrap images in a structure that holds both the SVG and PNG alternative. In that case it is the browser that "selects" the right image.
During that load, the browser will also set a cookie indicating that it supports SVG as an image or not.
On the second load, or for subsequent ajax loads, the cookie will tell if the browser supports SVG for images. So instead of rendering a complex structure, either the SVG is rendered or the PNG is rendered. This is more efficient.
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Viewed: 10 510 times
Version: 1.1
Category: Tips
Written by: le_top
Last updated by: le_top
Created on: Nov 1, 2014
Last updated: 10 years ago
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10 years ago by
le_top Removed empty line to see more text in o...
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10 years ago by
le_top Changed title and description.