has-danger no longer working on Bootstrap v4 beta?

Question

According to the Bootstrap migration guide:

Renamed .has-error to .has-danger.

However, that doesn\'t seem to work. Border and t

Answer 1

Managed to get it to work. @ZimSystem is correct about this.

.has-danger exist in Alpha version but it was removed in Bootstrap v4 Beta. You will need to use is-invalid selector in the input and also include class="invalid-feedback" for error message.

Here is example:

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