export type LogMethod = | 'log' | 'info' | 'debug' | 'table' | 'error' | 'assert' | 'dir' | 'dirxml' | 'group' | 'groupCollapsed' | 'groupEnd' | 'trace' | 'warn' export type ConsoleEntry = { kind: 'console' method: LogMethod consoleMethodStack: string | null args: Array< | { kind: 'arg' data: T } | { kind: 'formatted-error-arg' prefix: string stack: string } > } export type ConsoleErrorEntry = { kind: 'any-logged-error' method: 'error' consoleErrorStack: string args: Array< | { kind: 'arg' data: T isRejectionMessage?: boolean } | { kind: 'formatted-error-arg' prefix: string stack: string | null } > } export type FormattedErrorEntry = { kind: 'formatted-error' prefix: string stack: string method: 'error' } export type ClientLogEntry = | ConsoleEntry | ConsoleErrorEntry | FormattedErrorEntry export type ServerLogEntry = | ConsoleEntry | ConsoleErrorEntry | FormattedErrorEntry export const UNDEFINED_MARKER = '__next_tagged_undefined' // Based on https://github.com/facebook/react/blob/28dc0776be2e1370fe217549d32aee2519f0cf05/packages/react-server/src/ReactFlightServer.js#L248 export function patchConsoleMethod( methodName: T, wrapper: ( methodName: T, ...args: Console[T] extends (...args: infer P) => any ? P : never[] ) => void ): () => void { const descriptor = Object.getOwnPropertyDescriptor(console, methodName) if ( descriptor && (descriptor.configurable || descriptor.writable) && typeof descriptor.value === 'function' ) { const originalMethod = descriptor.value as Console[T] extends ( ...args: any[] ) => any ? Console[T] : never const originalName = Object.getOwnPropertyDescriptor(originalMethod, 'name') const wrapperMethod = function ( this: typeof console, ...args: Console[T] extends (...args: infer P) => any ? P : never[] ) { wrapper(methodName, ...args) originalMethod.apply(this, args) } if (originalName) { Object.defineProperty(wrapperMethod, 'name', originalName) } Object.defineProperty(console, methodName, { value: wrapperMethod, }) return () => { Object.defineProperty(console, methodName, { value: originalMethod, writable: descriptor.writable, configurable: descriptor.configurable, }) } } return () => {} }