Getting Error Promise is undefined in IE11

Question

I am converting React code to typescript, target in tsconfig is es5.

on running in IE 11 i get an error \"Promise is undefined\"

I know i need to polyfill,bu

Answer 1

You need to add Promise polyfill.

Include polyfill in your bundle. https://github.com/stefanpenner/es6-promise

Load polyfill only if the browser / device need: https://www.npmjs.com/package/polyfill-io-feature-detection