Bun implementa i seguenti globali.

Global	Source	Note
AbortController	Web
AbortSignal	Web
alert	Web	Inteso per strumenti da riga di comando
Blob	Web
Buffer	Node.js	Vedi Node.js > Buffer
Bun	Bun	Soggetto a modifiche man mano che vengono aggiunte API aggiuntive
ByteLengthQueuingStrategy	Web
confirm	Web	Inteso per strumenti da riga di comando
__dirname	Node.js
__filename	Node.js
atob()	Web
btoa()	Web
BuildMessage	Bun
clearImmediate()	Web
clearInterval()	Web
clearTimeout()	Web
console	Web
CountQueuingStrategy	Web
Crypto	Web
crypto	Web
CryptoKey	Web
CustomEvent	Web
Event	Web	Anche ErrorEvent CloseEvent MessageEvent.
EventTarget	Web
exports	Node.js
fetch	Web
FormData	Web
global	Node.js	Vedi Node.js > global.
globalThis	Cross-platform	Alias di global
Headers	Web
HTMLRewriter	Cloudflare
JSON	Web
MessageEvent	Web
module	Node.js
performance	Web
process	Node.js	Vedi Node.js > process
prompt	Web	Inteso per strumenti da riga di comando
queueMicrotask()	Web
ReadableByteStreamController	Web
ReadableStream	Web
ReadableStreamDefaultController	Web
ReadableStreamDefaultReader	Web
reportError	Web
require()	Node.js
ResolveMessage	Bun
Response	Web
Request	Web
setImmediate()	Web
setInterval()	Web
setTimeout()	Web
ShadowRealm	Web	Proposta Stage 3
SubtleCrypto	Web
DOMException	Web
TextDecoder	Web
TextEncoder	Web
TransformStream	Web
TransformStreamDefaultController	Web
URL	Web
URLSearchParams	Web
WebAssembly	Web
WritableStream	Web
WritableStreamDefaultController	Web
WritableStreamDefaultWriter	Web