Function eq

packages/utils/src/index.ts:117–144

(
  valA: any, // eslint-disable-line
  valB: any, // eslint-disable-line
  deep = true,
  explicit: string[] = ['__key']
)

 * @public
 */
export function eq(
  valA: any, // eslint-disable-line
  valB: any, // eslint-disable-line
  deep = true,
  explicit: string[] = ['__key']
): boolean {
  if (valA === valB) return true
  if (typeof valB === 'object' && typeof valA === 'object') {
    if (valA instanceof Map) return false
    if (valA instanceof Set) return false
    if (valA instanceof Date && valB instanceof Date)
      return valA.getTime() === valB.getTime()
    if (valA instanceof RegExp && valB instanceof RegExp)
      return eqRegExp(valA, valB)
    if (valA === null || valB === null) return false
    if (Object.keys(valA).length !== Object.keys(valB).length) return false
    for (const k of explicit) {
      if ((k in valA || k in valB) && valA[k] !== valB[k]) return false
    }
    for (const key in valA) {
      if (!(key in valB)) return false
      if (valA[key] !== valB[key] && !deep) return false
      if (deep && !eq(valA[key], valB[key], deep, explicit)) return false
    }
    return true
  }
  return false
}

/**
 * A regular expression to test for a valid date string.