What are the approaches to include polyfills in your create-react-app?
There are approaches to include polyfills in create-react-app,
Manual import from core-js:
Create a file called (something like) polyfills.js and import it into root index.js file. Run npm install core-js or yarn add core-js and import your specific required features.
import "core-js/fn/array/find"
import "core-js/fn/array/includes"
import "core-js/fn/number/is-nan"
Using Polyfill service:
Use the polyfill.io CDN to retrieve custom, browser-specific polyfills by adding this line to index.html:
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=default,Array.prototype.includes"></script>
In the above script we had to explicitly request the Array.prototype.includes feature as it is not included in the default feature set.
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