Function warnOnce

packages/internals/src/warnOnce.ts:5–10

(key: string, message: string, ...args: unknown[])

const alreadyWarned = new Set()

export const warnOnce = (key: string, message: string, ...args: unknown[]) => {
  if (!alreadyWarned.has(key)) {
    alreadyWarned.add(key)
    warn(message, ...args)
  }
}