Function warnDeprecation

packages/runtime-core/src/compat/compatConfig.ts:438–493

(
  key: DeprecationTypes,
  instance: ComponentInternalInstance | null,
  ...args: any[]
)

}

export function warnDeprecation(
  key: DeprecationTypes,
  instance: ComponentInternalInstance | null,
  ...args: any[]
): void {
  if (!__DEV__) {
    return
  }
  if (__TEST__ && !warningEnabled) {
    return
  }

  instance = instance || getCurrentInstance()

  // check user config
  const config = getCompatConfigForKey(key, instance)
  if (config === 'suppress-warning') {
    return
  }

  const dupKey = key + args.join('')
  let compId: string | number | null =
    instance && formatComponentName(instance, instance.type)
  if (compId === 'Anonymous' && instance) {
    compId = instance.uid
  }

  // skip if the same warning is emitted for the same component type
  const componentDupKey = dupKey + compId
  if (!__TEST__ && componentDupKey in instanceWarned) {
    return
  }
  instanceWarned[componentDupKey] = true

  // same warning, but different component. skip the long message and just
  // log the key and count.
  if (!__TEST__ && dupKey in warnCount) {
    warn(`(deprecation ${key}) (${++warnCount[dupKey] + 1})`)
    return
  }

  warnCount[dupKey] = 0

  const { message, link } = deprecationData[key]
  warn(
    `(deprecation ${key}) ${
      typeof message === 'function' ? message(...args) : message
    }${link ? `\n  Details: ${link}` : ``}`,
  )
  if (!isCompatEnabled(key, instance, true)) {
    console.error(
      `^ The above deprecation's compat behavior is disabled and will likely ` +
        `lead to runtime errors.`,
    )
  }
}

export type CompatConfig = Partial<