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

Add this script:

After that you can test in the console if the Promise is working in IE

var promise = new Promise(function (resolve, reject) {
setTimeout(function () {
    resolve('bar');
}, 1000);
});
promise.then(function(result) {
  console.log(result);
});