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Introduction to Feature Policy

https://developers.google.com/web/updates/2018/06/feature-policy

by tbassetto • 8 years ago

2 2 8 years ago

DE

developers.google.com

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2

cimmanom• 8 years ago

I'm not sure I understand the use case for this. Shouldn't you already have control over what browser features your site uses?

ebidel• 8 years ago

Yes and no. In some cases (3rd party content that you don't control), there's no way to know what script/iframe is going to do/use. For example, ads script that uses `document.write()` and kills perf.

Turning on certain policies can also help you be certain quality/standards are being met across your site. For example, the creative team forgets to optimize images and you end up shipping many more MBs of images than actually needed. The `image-compression` feature policy could be used as a gut check to make sure that never happens.

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