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我如何验证DOJO selectOneMenu(required =“true”)这里是一些虚拟代码。DOJO:如何验证(必填=“true”)selectOneMenu
<select required="true" missingMessage="Ooops! You forgot your gender!"
name="gender" id="gender" data-dojo-type="dijit/form/?">
<option disabled="true" value="">Select a Gender</option>
<option value="1">Male</option>
<option value="2">Female</option>
</select>