1、校验器方法 - forbiddenCharValidator 

const idUpdateFormRef = ref(null);
const forbiddenCharValidator = (rule, value, callback) => {
  const forbiddenCharacters = [
    'as',
    'for',
    'default',
    'in',
    'join',
    'left',
    'inner',
    'right',
    'where',
    'when',
    'case',
    'select'
  ];
  for (let forbiddenCharacter of forbiddenCharacters) {
    if (value && value === forbiddenCharacter) {
      callback(new Error(`不能使用关键字 '${forbiddenCharacter}' 作为ID`));
      return;
    }
  }
  callback();
};

2、校验规则

const idFormRules = {
  guidText: [
    {
      required: true,
      message: '请输入ID',
      trigger: 'blur'
    },
    { validator: forbiddenCharValidator, trigger: 'blur' },
    { min: 8, max: 8, message: 'ID必须为8位', trigger: 'blur' },
    {
      pattern: /^[a-z0-9]+$/,
      message: '输入只能包含小写字母和数字',
      trigger: 'blur'
    }
  ]
};

3、 确定事件

通过校验才能关闭弹窗

const confirmModifyIdDialog = () => {
  guidUpdateFormRef.value.validate((valid) => {
    if (valid) {
      openModifyIdDialog.value = false;
    }
  });
};

4、html

<el-dialog v-model="openModifyIdDialog" title="修改ID">
    <el-form
      ref="idUpdateFormRef"
      :model="idUpdateForm"
      :rules="idFormRules"
    >
      <el-form-item
         label="ID:"
         style="margin-left: 20px"
         prop="idText"
      >
          <el-input
              v-model="idUpdateForm.idText"
              placeholder="请输入ID"
          />
      </el-form-item>
    </el-form>
    <template #footer>
      <div class="dialog-footer">
        <el-button @click="cancelModifyIdDialog">取消</el-button>
        <el-button type="primary" @click="confirmModifyIdDialog">
           确定
        </el-button>
      </div>
    </template>
</el-dialog>
              

 以上就是实现关键字校验器的具体步骤。