![Missing border radius on input group with validation feedback · Issue #25110 · twbs/bootstrap · GitHub Missing border radius on input group with validation feedback · Issue #25110 · twbs/bootstrap · GitHub](https://user-images.githubusercontent.com/23639869/34426369-e70a858c-ec35-11e7-86f4-f178276e1f6e.png)
Missing border radius on input group with validation feedback · Issue #25110 · twbs/bootstrap · GitHub
![html - Bootstrap-4 validation: Add border and background-color to form input -group - Stack Overflow html - Bootstrap-4 validation: Add border and background-color to form input -group - Stack Overflow](https://i.stack.imgur.com/qil8y.png)
html - Bootstrap-4 validation: Add border and background-color to form input -group - Stack Overflow
![invalid-feedback doesn't show for .input-group with an invalid control · Issue #23454 · twbs/bootstrap · GitHub invalid-feedback doesn't show for .input-group with an invalid control · Issue #23454 · twbs/bootstrap · GitHub](https://user-images.githubusercontent.com/98681/77345305-aaff5600-6cf1-11ea-8cff-136883f5ae11.png)
invalid-feedback doesn't show for .input-group with an invalid control · Issue #23454 · twbs/bootstrap · GitHub
![valid/invalid custom select reverts to default border color on focus · Issue #24553 · twbs/bootstrap · GitHub valid/invalid custom select reverts to default border color on focus · Issue #24553 · twbs/bootstrap · GitHub](https://user-images.githubusercontent.com/2781561/32022894-209e93e8-b9ae-11e7-86c0-f4b78dad5ba7.png)