Yup: IE11, error in toposort/node_modules/index.js

[jakubarendac]

Using react: 16.4.1, typescript: 2.9.2, yup: 0.25.1.
Build of app cannot be rendered in IE11. It is caused by
throw new Error( 'Unknown node. There is an unknown node in the supplied edges.', );
on line 29 and
throw new Error( 'Found unknown node. Make sure to provided all involved nodes. Unknown node: ' + JSON.stringify(node), );
on line 53 in funciton toposort and visit in index.js.
Problem is comma in the error object. When the prettier is disabled and comma not added to object everything works fine.

[jquense]

orry i'm not sure, we've not run into this issue on IE11, and without more info it's hard to troubleshoot

[ThomasLarge]

I also have this issue,

TypeError: Object doesn't support property or method 'from'

see attached screenshot

I'm using Yup with Formik but when I am using the validationSchema it's creating this issue

const validationSchema = Yup.object().shape({
   title: Yup.string().required('Required'),
   description: Yup.string().required('Required'),
   meta: Yup.string().required('Required'),
   push: this.state.push
    ? Yup.string().required('You must add text to send out')
     Yup.string()
});

If you need anything else to help you please let me know!

@jquense are we able to open this issue again?

[RusinovAnton]

@ThomasLarge looks like you need to add a polyfill for that to work:
PTAL at https://babeljs.io/docs/en/babel-polyfill or https://github.com/zloirock/core-js

[ThomasLarge]

@RusinovAnton Thanks, I will check this works and let you know!

[jakubarendac]

@ThomasLarge polyfill fixed this for me as well

[hassanamjad89]

I don't see get this particular issue in SPFx 1.9.1. But recently I did receive
"TypeError: Object doesn't support property or method 'from'" exception in IE browser when I was using the super awesome 'Yup' validation module in my code. In order to fix this I had to include the following import.
import "core-js/es6/array";

So far this is the only polyfill I had to manually include. Hope Microsoft includes the above polyfill in newer versions of SPFx.

I will update here if in future I am forced to import additional polyfills manually.

[joshgeller]

@ThomasLarge looks like you need to add a polyfill for that to work:
PTAL at https://babeljs.io/docs/en/babel-polyfill or https://github.com/zloirock/core-js

Hi, do you know which polyfill specifically is required to resolve this issue?

[hassanamjad89]

@ThomasLarge looks like you need to add a polyfill for that to work:
PTAL at https://babeljs.io/docs/en/babel-polyfill or https://github.com/zloirock/core-js

Hi, do you know which polyfill specifically is required to resolve this issue?

For me the issue was fixed by adding "core-js/es6/array" polyfill.

[helariL]

I don't understand why this issue was closed. Adding polyfills is not always possible. Would it be possible to look into ways of fixing this? IE11 is officially supported for 5 more years.