element ui 表单单独验证某个元素
例：
<el-form :model="formData" ref="form" label-width="auto" :rules="rules" :scroll-to-error="true" > <el-form-item label="新手机号码" prop="mobile"> <div class="ele inline"> <el-input v-model="formData.mobile" style="width:360px;"></el-input> </div> </el-form-item> </el-form>
this.$refs.form.validateField('mobile');