Angualr4 Custom form validation question

  add = this.form.group({
    buildingNo: [null, [Validators.required]],
    roomNo: [null, [Validators.required]],
    roomResourceType: ["1", [Validators.required]],
    roomBuildAcreage: [null, [Validators.required]],
    roomEquipments: [null, [Validators.required]],
    roomDecorateState: ["1", [Validators.required]],
    roomRentedAcreage: [null, [Validators.required]],
    roomResourceState: ["1", [Validators.required]],
    roomDesc: [null],
  });

now you want to verify that roomBuildAcreage must be greater than or equal to roomRentedAcreage. How to write custom verification

Xiaobai asks for advice

Angualr

Sep.28,2021

add a custom function after roomBuildAcreage, and take out the roomRentedAcreage in it for comparison. If you do not meet the conditions, an error will be returned. That's fine

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