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+Many web APIs aren't relevant in the context of a server-first runtime like Bun, such as the [DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API#html_dom_api_interfaces), [`localStorage`](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage), and [`History`](https://developer.mozilla.org/en-US/docs/Web/API/History_API). Many others, though, are broadly useful outside of the browser context; when possible, Bun implements these Web-standard APIs instead of introducing new APIs.
+
+The following Web APIs are partially or completely supported.
+
+## Globals
+
+{% table %}
+
+---
+
+- Crypto
+- [`crypto`](https://developer.mozilla.org/en-US/docs/Web/API/Crypto) [`SubtleCrypto`](https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto)
+  [`CryptoKey`](https://developer.mozilla.org/en-US/docs/Web/API/CryptoKey)
+
+---
+
+- Debugging
+
+- [`console`](https://developer.mozilla.org/en-US/docs/Web/API/console)[`performance`](https://developer.mozilla.org/en-US/docs/Web/API/Performance)
+
+---
+
+- Encoding and decoding
+- [`atob`](https://developer.mozilla.org/en-US/docs/Web/API/atob) [`btoa`](https://developer.mozilla.org/en-US/docs/Web/API/btoa) [`TextEncoder`](https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder) [`TextDecoder`](https://developer.mozilla.org/en-US/docs/Web/API/TextDecoder)
+
+---
+
+- Timeouts
+- [`setTimeout`](https://developer.mozilla.org/en-US/docs/Web/API/setTimeout) [`clearTimeout`](https://developer.mozilla.org/en-US/docs/Web/API/clearTimeout)
+
+---
+
+- Intervals
+- [`setInterval`](https://developer.mozilla.org/en-US/docs/Web/API/setInterval)[`clearInterval`](https://developer.mozilla.org/en-US/docs/Web/API/clearInterval)
+
+---
+
+- HTTP
+- [`fetch`](https://developer.mozilla.org/en-US/docs/Web/API/fetch) [`Response`](https://developer.mozilla.org/en-US/docs/Web/API/Response) [`Request`](https://developer.mozilla.org/en-US/docs/Web/API/Request) [`Headers`](https://developer.mozilla.org/en-US/docs/Web/API/Headers) [`AbortController`](https://developer.mozilla.org/en-US/docs/Web/API/AbortController) [`AbortSignal`](https://developer.mozilla.org/en-US/docs/Web/API/AbortSignal)
+
+---
+
+- Microtasks
+- [`queueMicrotask`](https://developer.mozilla.org/en-US/docs/Web/API/queueMicrotask)
+
+---
+
+- Errors
+- [`reportError`](https://developer.mozilla.org/en-US/docs/Web/API/reportError) [`ResolveError`](https://developer.mozilla.org/en-US/docs/Web/API/ResolveError)
+  [`BuildError`](https://developer.mozilla.org/en-US/docs/Web/API/BuildError)
+
+---
+
+- User interaction
+- [`alert`](https://developer.mozilla.org/en-US/docs/Web/API/Window/alert) [`confirm`](https://developer.mozilla.org/en-US/docs/Web/API/Window/confirm) [`prompt`](https://developer.mozilla.org/en-US/docs/Web/API/Window/prompt)
+
+<!-- - Blocking. Prints the alert message to terminal and awaits `[ENTER]` before proceeding. -->
+<!-- - Blocking. Prints confirmation message and awaits `[y/N]` input from user. Returns `true` if user entered `y` or `Y`, `false` otherwise.
+- Blocking. Prints prompt message and awaits user input. Returns the user input as a string. -->
+
+- Blob
+- [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob)
+
+---
+
+- Realms
+- [`ShadowRealm`](https://github.com/tc39/proposal-shadowrealm)
+
+---
+
+- Events
+- [`EventTarget`](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget)
+  [`Event`](https://developer.mozilla.org/en-US/docs/Web/API/Event) [`ErrorEvent`](https://developer.mozilla.org/en-US/docs/Web/API/ErrorEvent) [`CloseEvent`](https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent) [`MessageEvent`](https://developer.mozilla.org/en-US/docs/Web/API/MessageEvent)
+
+---
+
+- WebSockets
+- [`WebSocket`](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket)
+
+---
+
+- URLs
+- [`URL`](https://developer.mozilla.org/en-US/docs/Web/API/URL) [`URLSearchParams`](https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams)
+
+---
+
+- Streams
+- [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream) [`WritableStream`](https://developer.mozilla.org/en-US/docs/Web/API/WritableStream) [`TransformStream`](https://developer.mozilla.org/en-US/docs/Web/API/TransformStream) [`ByteLengthQueuingStrategy`](https://developer.mozilla.org/en-US/docs/Web/API/ByteLengthQueuingStrategy) [`CountQueuingStrategy`](https://developer.mozilla.org/en-US/docs/Web/API/CountQueuingStrategy) plus associated `*Reader`, `*Writer`, and `*Controller` classes.
+
+<!-- ## Globals
+
+{% table %}
+
+---
+
+---
+
+- [`console`](https://developer.mozilla.org/en-US/docs/Web/API/console)
+
+---
+
+- [`crypto`](https://developer.mozilla.org/en-US/docs/Web/API/Crypto)
+
+---
+
+- [`performance`](https://developer.mozilla.org/en-US/docs/Web/API/Performance)
+
+{% /table %}
+
+## Functions
+
+{% table %}
+
+- [`atob`](https://developer.mozilla.org/en-US/docs/Web/API/atob)
+
+---
+
+- [`btoa`](https://developer.mozilla.org/en-US/docs/Web/API/btoa)
+
+---
+
+- [`clearInterval`](https://developer.mozilla.org/en-US/docs/Web/API/clearInterval)
+
+---
+
+- [`clearTimeout`](https://developer.mozilla.org/en-US/docs/Web/API/clearTimeout)
+
+---
+
+- [`fetch`](https://developer.mozilla.org/en-US/docs/Web/API/fetch)
+
+---
+
+- [`queueMicrotask`](https://developer.mozilla.org/en-US/docs/Web/API/queueMicrotask)
+
+---
+
+- [`reportError`](https://developer.mozilla.org/en-US/docs/Web/API/reportError)
+
+---
+
+- [`setInterval`](https://developer.mozilla.org/en-US/docs/Web/API/setInterval)
+
+---
+
+- [`setTimeout`](https://developer.mozilla.org/en-US/docs/Web/API/setTimeout)
+
+---
+
+- [`alert`](https://developer.mozilla.org/en-US/docs/Web/API/alert)
+- Blocking. Prints the alert message to terminal and awaits `[ENTER]` before proceeding.
+
+---
+
+- [`confirm`](https://developer.mozilla.org/en-US/docs/Web/API/confirm)
+- Blocking. Prints confirmation message and awaits `[y/N]` input from user. Returns `true` if user entered `y` or `Y`, `false` otherwise.
+
+---
+
+- [`prompt`](https://developer.mozilla.org/en-US/docs/Web/API/prompt)
+- Blocking. Prints prompt message and awaits user input. Returns the user input as a string.
+
+---
+
+- [`console`](https://developer.mozilla.org/en-US/docs/Web/API/console)
+
+{% /table %}
+
+## Classes
+
+{% table %}
+
+---
+
+- [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob)
+
+---
+
+- [`Response`](https://developer.mozilla.org/en-US/docs/Web/API/Response)
+
+---
+
+- [`Request`](https://developer.mozilla.org/en-US/docs/Web/API/Request)
+
+---
+
+- [`TextEncoder`](https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder) and [`TextDecoder`](https://developer.mozilla.org/en-US/docs/Web/API/TextDecoder)
+
+---
+
+---
+
+- [`ShadowRealm`](https://github.com/tc39/proposal-shadowrealm)
+- A ["better `eval`](https://2ality.com/2022/04/shadow-realms.html). Currently a Stage 3 TC39 proposal
+
+---
+
+- [`Headers`](https://developer.mozilla.org/en-US/docs/Web/API/Headers)
+
+---
+
+- [`EventTarget`](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget)
+
+---
+
+- [`Event`](https://developer.mozilla.org/en-US/docs/Web/API/Event)
+
+---
+
+- [`ErrorEvent`](https://developer.mozilla.org/en-US/docs/Web/API/ErrorEvent)
+
+---
+
+- [`CloseEvent`](https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent)
+
+---
+
+- [`MessageEvent`](https://developer.mozilla.org/en-US/docs/Web/API/MessageEvent)
+
+---
+
+- [`WebSocket`](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket)
+
+---
+
+- [`URLSearchParams`](https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams)
+
+---
+
+- [`URL`](https://developer.mozilla.org/en-US/docs/Web/API/URL)
+
+---
+
+- [`AbortController`](https://developer.mozilla.org/en-US/docs/Web/API/AbortController)
+
+---
+
+- [`Loader`](https://developer.mozilla.org/en-US/docs/Web/API/Loader)
+
+---
+
+- [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream)
+
+---
+
+- [`AbortSignal`](https://developer.mozilla.org/en-US/docs/Web/API/AbortSignal)
+
+---
+
+- [`ByteLengthQueuingStrategy`](https://developer.mozilla.org/en-US/docs/Web/API/ByteLengthQueuingStrategy)
+
+---
+
+- [`ReadableStreamDefaultController`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamDefaultController)
+
+---
+
+- [`ReadableStreamDefaultReader`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamDefaultReader)
+
+---
+
+- [`WritableStream`](https://developer.mozilla.org/en-US/docs/Web/API/WritableStream)
+
+---
+
+- [`WritableStreamDefaultController`](https://developer.mozilla.org/en-US/docs/Web/API/WritableStreamDefaultController)
+
+---
+
+- [`WritableStreamDefaultWriter`](https://developer.mozilla.org/en-US/docs/Web/API/WritableStreamDefaultWriter)
+
+---
+
+- [`TransformStream`](https://developer.mozilla.org/en-US/docs/Web/API/TransformStream)
+
+---
+
+- [`TransformStreamDefaultController`](https://developer.mozilla.org/en-US/docs/Web/API/TransformStreamDefaultController)
+
+---
+
+- [`CountQueuingStrategy`](https://developer.mozilla.org/en-US/docs/Web/API/CountQueuingStrategy)
+
+---
+
+- [`SubtleCrypto`](https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto)
+
+---
+
+- [`CryptoKey`](https://developer.mozilla.org/en-US/docs/Web/API/CryptoKey)
+
+---
+
+- [`ResolveError`](https://developer.mozilla.org/en-US/docs/Web/API/ResolveError)
+
+---
+
+- [`BuildError`](https://developer.mozilla.org/en-US/docs/Web/API/BuildError)
+
+{% /table %} -->