无法在Bootstrap 4中进行验证

从Bootstrap 4beta版本开始验证已更改。

有效状态选择器使用

was-validated

<form  novalidate="">    <div >        <label  for="inputSuccess1">Input with success</label>        <input type="text"  name="i1" id="inputSuccess1">        <div >Success! You've done it.</div>    </div>    <div >        <label  for="inputSuccess2">Input with danger</label>        <input type="text"  name="i2" required="" id="inputSuccess2">        <div >That didn't work.</div>    </div>    <div >        <button type="submit" >Text</button>    </div></form>

如文档中所述，如果您打算使用 服务器端 验证，则只需在表单控件上设置

is-valid

is-invalid

<form >    <div >        <label  for="inputSuccess1">Input with success</label>        <input type="text"  id="inputSuccess1">        <div >Success! You've done it.</div>    </div></form>