Function invariant

packages/react-intl/utils.tsx:7–15

(
  condition: boolean,
  message: string,
  Err: any = Error
)

import {DEFAULT_INTL_CONFIG as CORE_DEFAULT_INTL_CONFIG} from '@formatjs/intl'

export function invariant(
  condition: boolean,
  message: string,
  Err: any = Error
): asserts condition {
  if (!condition) {
    throw new Err(message)
  }
}

export function invariantIntlContext(intl?: any): asserts intl {
  invariant(