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Automatic polyfilling

Yesterday, I neglected to include in my list of polyfills. is a service that reads the user agent of your visitor’s browser and automatically serves up just the polyfills that they need.

I haven’t personally used it on any projects yet, but it’s been recommended to me a handful of times. Check it out.

🔥 Hot off the press! I just launched a new pocket guide. Learn how to build interactive web apps with vanilla JavaScript.

Have any questions or comments about this post? Email me at or contact me on Twitter at @ChrisFerdinandi.

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