Function evaluate

packages/form-core/src/utils.ts:420–473

(objA: T, objB: T)

}

export function evaluate<T>(objA: T, objB: T) {
  if (Object.is(objA, objB)) {
    return true
  }

  if (
    typeof objA !== 'object' ||
    objA === null ||
    typeof objB !== 'object' ||
    objB === null
  ) {
    return false
  }

  if (objA instanceof Date && objB instanceof Date) {
    return objA.getTime() === objB.getTime()
  }

  if (objA instanceof Map && objB instanceof Map) {
    if (objA.size !== objB.size) return false
    for (const [k, v] of objA) {
      if (!objB.has(k) || !Object.is(v, objB.get(k))) return false
    }
    return true
  }

  if (objA instanceof Set && objB instanceof Set) {
    if (objA.size !== objB.size) return false
    for (const v of objA) {
      if (!objB.has(v)) return false
    }
    return true
  }

  const keysA = Object.keys(objA)
  const keysB = Object.keys(objB)

  if (keysA.length !== keysB.length) {
    return false
  }

  for (const key of keysA) {
    // performs recursive search down the object tree

    if (
      !keysB.includes(key) ||
      !evaluate(objA[key as keyof T], objB[key as keyof T])
    ) {
      return false
    }
  }

  return true
}

/**
 * Determines the logic for determining the error source and value to set on the field meta within the form level sync/async validation.