I have implemented a bot (4.0) that uses QnA maker follow up prompts feature. The bot is embedded within a web page via direct line channel and my web page is using webchat-es5.js to make it compatible with IE11. However when the answer from QnA maker has follow up prompt, the page actually hangs in IE11 because webchat-es5.js throws an error
uncaught at anonymous TypeError: Object doesn't support property or method 'Symbol(Symbol.iterator)_6.si6vipw8wb1'"
Upon debugging that js I found out that if I skip below line in script then it works.
var v=(0,i.default)(t.children,1)[0]
Has anyone come across this problem? Any help is appreciated. The follow up feature works fine in Chrome, Edge and Firefox. The issue exists only in IE11.
It seems that this is an issue related to the webchat, you could check this similar thread, and the developer was investigating the cause and will fix it in the latest release.
As a temporary workaround, you could try to use the browser-polyfill from [email protected]. Just add this to your index.html:
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.6.15/browser-polyfill.min.js"></script>