In the quill repo this bug was fixed a while ago, but I'm still seeing this issue:
https://github.com/quilljs/quill/issues/360.
I've tried playing with the styling and it doesn't seem to change anything. Open the given codepen and create a link - the pop up opens outside of the editor.
http://codepen.io/alexkrolick/pen/xgyOXQ/left?editors=0010#0

Quill version:
Add the bounds prop to constraint all the popups inside a DOM element:
bounds={'.app'}
https://quilljs.com/docs/configuration/#bounds
https://github.com/zenoamaro/react-quill/tree/master#props
Hi, I have same issue and when adding the bound prop I keep getting:
Warning: Failed prop type: Invalid propboundssupplied toQuill`` no matter what value I pass, even tried with document.body and got the same error.
For anyone like @dasm30, you have to pass in a string instead of the node (ref: https://github.com/zenoamaro/react-quill/issues/519)
Most helpful comment
Add the bounds prop to constraint all the popups inside a DOM element:
https://quilljs.com/docs/configuration/#bounds
https://github.com/zenoamaro/react-quill/tree/master#props