Function stringifyConsoleArg

packages/vite/src/shared/forwardConsole.ts:189–238

(value: unknown)

}

function stringifyConsoleArg(value: unknown): string {
  if (typeof value === 'string') {
    return value
  }
  if (
    typeof value === 'number' ||
    typeof value === 'boolean' ||
    typeof value === 'undefined'
  ) {
    return String(value)
  }
  if (typeof value === 'symbol') {
    return value.toString()
  }
  if (typeof value === 'function') {
    return value.name ? `[Function: ${value.name}]` : '[Function]'
  }
  if (value instanceof Error) {
    return value.stack || `${value.name}: ${value.message}`
  }
  if (typeof value === 'bigint') {
    return `${value}n`
  }

  const seen = new WeakSet<object>()
  try {
    const serialized = JSON.stringify(value, (_, nested) => {
      if (typeof nested === 'bigint') {
        return `${nested}n`
      }
      if (nested instanceof Error) {
        return {
          name: nested.name,
          message: nested.message,
          stack: nested.stack,
        }
      }
      if (nested && typeof nested === 'object') {
        if (seen.has(nested)) {
          return '[Circular]'
        }
        seen.add(nested)
      }
      return nested
    })
    return serialized ?? String(value)
  } catch {
    return String(value)
  }
}