What is Bun?

Installation

Quickstart

TypeScript

bun init

bun create

bun run

File types

TypeScript

JSX

Environment variables

Bun APIs

Web APIs

Node.js compatibility

Single-file executable

Plugins

Watch mode

Module resolution

Auto-install

bunfig.toml

Debugger

bun install

bun add

bun remove

bun update

bun publish

bun outdated

bun link

bun pm

Global cache

Workspaces

Lifecycle scripts

Filter

Lockfile

Scopes and registries

Overrides and resolutions

Patch dependencies

.npmrc support

Bun.build

HTML & static sites

CSS

Fullstack Dev Server

Hot reloading

Loaders

Plugins

Macros

vs esbuild

bun test

Writing tests

Watch mode

Lifecycle hooks

Mocks

Snapshots

Dates and times

DOM testing

Code coverage

bunx

HTTP server

HTTP client

WebSockets

Workers

Binary data

Streams

SQL

S3 Object Storage

File I/O

import.meta

SQLite

FileSystemRouter

TCP sockets

UDP sockets

Globals

$ Shell

Child processes

HTMLRewriter

Hashing

Console

Cookie

FFI

C Compiler

Testing

Utils

Node-API

Glob

DNS

Semver

Color

Transpiler

Roadmap

Benchmarking

Contributing

Building Windows

Bindgen

License

Theimport.meta object is a way for a module to access information about itself. It's part of the JavaScript language, but its contents are not standardized. Each "host" (browser, runtime, etc) is free to implement any properties it wishes on theimport.meta object.

Bun implements the following properties.

import.meta.dir;// => "/path/to/project"import.meta.file;// => "file.ts"import.meta.path;// => "/path/to/project/file.ts"import.meta.url;// => "file:///path/to/project/file.ts"import.meta.main;// `true` if this file is directly executed by `bun run`// `false` otherwiseimport.meta.resolve("zod");// => "file:///path/to/project/node_modules/zod/index.js"

import.meta.resolve("zod");// => "file:///path/to/project/node_modules/zod/index.ts"