问当React JS中的状态或输入值发生变化时，如何禁用按钮？

EN

getCustomValidation() {

  // Extract a list for validation on only the state fields that are 
  // relevance to the form validation
  const fieldsToValidate = [
    "ppvLimit",
    "securityCode",
    "primaryPhone",
    "secondaryPhone",
    "email",
    "billingAddressLine1",
    "billingAddressLine2",
    "billingAddressCity",
    "billingAddressTerritoryCode",
    "billingAddressPostalCode",
    "contactAddressLine1",
    "contactAddressLine2",
    "contactAddressCity",
    "contactAddressTerritoryCode",
    "contactAddressPostalCode",
    "authorizedUser1",
    "authorizedUser2",
    "authorizedUser3",
    "authorizedUser4"
  ];

  // Iterate each field to check to determine if field is valid
  for(const fieldToValidate of fieldsToValidate) {

    // Extract value for current field
    const value = this.state[ fieldToValidate ]

    // If value is "truthy" then return valid (true)
    if( !!value ) {
      return true
    }
  }

  // If none of the validation fields are valid, return false
  return false;
}

<Button primary disabled={ !this.getCustomValidation() } type="submit">
{ loading ? <div><LoadingIcon size="lg" /> Saving...</div> : "Update" }
</Button>