关于javascript:常用表单验证规则

        username: [          {            required: true,            message: "请输出正确姓名",            trigger: "blur",            pattern: /^[\u4E00-\u9FA5a-zA-Z]{2,20}$/,          },        ],        mobile: {          required: true,          pattern: /^1\d{10}$/,          message: "请输出正确的手机号",          trigger: "blur",        },        email: {          required: true,          pattern: /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/,          message: "请输出正确的邮箱",          trigger: "blur",        },