按照Bootstrap migration guide:has-danger不再适用于Bootstrap v4 beta?
改名。先后-错误。先后-危险。
但是,这似乎并不奏效。边框和文字尚未着色。
例如:
<div class="form-group has-danger">
<label class="form-control-label" for="inputDanger1">Input with danger</label>
<input type="text" class="form-control form-control-danger" id="inputDanger1">
<div class="form-control-feedback">Sorry, that username's taken. Try another?</div>
<small class="form-text text-muted">Example help text that remains unchanged.</small>
</div>
演示:
https://jsfiddle.net/uLa0spfm/
如果你要“围绕工作” downvote一个 - 至少在解释原因。 – ProEvilz