# Polyfill as needed with polyfill-service

DevFeed: [Polyfill as needed with polyfill-service](<https://devfeed.tech/articles/polyfill-as-needed-with-polyfill-service-51845.md>)

Original publisher: [Read original article](<https://kentcdodds.com/blog/polyfill-as-needed-with-polyfill-service>)

Published: 2018-08-06T00:00:00Z

Content type: tutorial

Language: en

Sources: [Kent C. Dodds Blog](<https://devfeed.tech/sources/kent-c-dodds-blog.md>)

Topics: [polyfill](<https://devfeed.tech/topics/polyfill.md>), [JavaScript](<https://devfeed.tech/topics/javascript.md>), [browser](<https://devfeed.tech/topics/browser.md>), [Web Development](<https://devfeed.tech/topics/web-development.md>)

Tags: [browser](<https://devfeed.tech/tags/browser.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [javascript](<https://devfeed.tech/tags/javascript.md>), [loading](<https://devfeed.tech/tags/loading.md>), [performance](<https://devfeed.tech/tags/performance.md>), [polyfill](<https://devfeed.tech/tags/polyfill.md>), [polyfills](<https://devfeed.tech/tags/polyfills.md>)

## AI overview

A tutorial on serving only the JavaScript polyfills required by each requesting browser. It explains how a customized polyfill-service endpoint can reduce unnecessary downloads, parsing, and execution for users on modern browsers while supporting older browsers such as Internet Explorer 10.

## Source excerpt

How to maximize the performance of loading polyfills for your application users.