是的：将字段本身与另一个字段进行比较

I had

StartIntensity: yup.number(),
EndIntensity: yup
    .number()
    .when(
        "StartIntensity",
        (StartIntensity: number, schema: any) => {
            return !!StartIntensity
                ? schema.moreThan(
                        StartIntensity,
                        "Max should be > min"
                  )
                : schema;
        }
    ),

但我需要类似的东西

StartIntensity: yup.number(),
EndIntensity: yup
    .number()
    .when(
        "StartIntensity, EndIntensity",
        (StartIntensity: number, EndIntensity: number, schema: any) => {
            return !!StartIntensity && StartIntensity !== EndIntensity
                ? schema.moreThan(
                        StartIntensity,
                        "Max should be > min"
                  )
                : schema;
        }
    ),

但上面的代码不能正常工作。是否有可能通过其他方式来执行此验证？

在你的情况下第一个参数.when()应该是一个键数组：

StartIntensity: yup.number(),
EndIntensity: yup
    .number()
    .when(
        ["StartIntensity", "EndIntensity"],
        (StartIntensity: number, EndIntensity: number, schema: any) => {
            return !!StartIntensity && StartIntensity !== EndIntensity
                ? schema.moreThan(
                        StartIntensity,
                        "Max should be > min"
                  )
                : schema;
        }
    ),

键：字符串 |大批

https://github.com/jquense/yup#mixedwhenkeys-string--arraystring-builder-object--value-schema-schema-schema https://github.com/jquense/yup#mixedwhenkeys-string--arraystring-builder-object--value-schema-schema-schema

如果上面的代码抛出“循环依赖”错误（我认为它会），请尝试以下代码：

StartIntensity: yup.number(),
EndIntensity: yup
    .number()
    .when('StartIntensity', (StartIntensity, schema) => {
      return schema.test({
        test: EndIntensity => !!StartIntensity && EndIntensity > StartIntensity,
        message: "Max should be > min"
      })
    }),

或者您也可以使用ref:

StartIntensity: yup.number(),
EndIntensity: yup
    .number()
    .moreThan(yup.ref('StartIntensity'), "Max should be > min")