radio的required表示必须选中一个。
<input type =“ radio” id =“ gender_male” value =“ m” name =“ gender”必需/> type = “ radio” id = “ gender_male” value = “ m” name = “ gender”必需/>
<input type =“ radio” id =“ gender_female” value =“ f” name =“ gender” /><input type = “ radio” id = “ gender_female” value = “ f” name = “ gender” />
复选框的必需表示必须选择。
<input type =“ checkbox” class =“ checkbox” id =“ agree” name =“ agree”必需/>
键入= “复选框”类= “复选框” ID = “同意”名称= “同意”需要/>
checkbox的minlength表示必须包含最小的数，maxlength表示最大的计数个数，rangelength：[2,3]表示一个数区间。
<input type =“ checkbox” class =“ checkbox” id =“ spam_email” value =“ email” name =“ spam []”必需minlength =“ 2” /> 类型= “复选框”类= “复选框” id = “ spam_email”值= “ email”名称= “ spam []”必需minlength = “ 2” />
<input type =“ checkbox” class =“ checkbox” id =“ spam_phone” value =“电话” name =“ spam []” /><input type = “ checkbox” class = “ checkbox” id = “ spam_phone”值= “ phone”名称= “ spam []” />
<input type =“ checkbox” class =“ checkbox” id =“ spam_mail” value =“ mail” name =“ spam []” /><input type = “复选框” class = “复选框” id = “ spam_mail” value = “邮件” name = “ spam []” />
选择的必需表示表示的值不能为空。
<select id =“ jungle” name =“ jungle” title =“请选择一些东西！” 必填> id = “ jungle”名称= “ jungle”标题= “请选择一些东西！” 必填>
<option value =“”> </ option><option value = “” > </ option>
<option value =“ 1”> Buga </ option><option value = “ 1” > Buga </ option>
<option value =“ 2”> Baga </ option><option value = “ 2” > Baga </ option>
<option value =“ 3”> Oi </ option><option value = “ 3” > Oi </ option>
</ select></ select>
select的minlength表示最大的指示个数，rangelength表示最大的指示个数，rangelength：[2,3]表示一个个数区间。
<select id =“ fruit” name =“ fruit” title =“请选择至少两个水果” class =“ {required：true，minlength：2}” multiple =“ multiple”> id = “ fruit”名称= “ fruit”标题= “请选择至少两个水果” class = “ {required：true，minlength：2}” multiple = “ multiple” >
<option value =“ b”>香蕉</ option><option value = “ b” >香蕉</ option>
<option value =“ a”>苹果</ option><option value = “ a” >苹果</ option>
<option value =“ p”>桃子</ option><option value = “ p” >桃</ option>
<option value =“ t”>乌龟</ option><option value = “ t” >乌龟</ option>
</ select></ select>
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