Web APIs

Check out the documentation for the JavaScript Runtime Environment on Azion's Edge Computing platform.

View as Markdown

The JavaScript Runtime Environment is a set of APIs that are available as tools for the development of functions.

You can deploy projects using the Azion Edge Infrastructure, and automatically provision what is needed for your code to run on a low latency rate, closer to the users.

WinterTC Compliance

Azion participates in WinterTC (TC55), an Ecma International Technical Committee that standardizes a minimum common API for web-interoperable server-side JavaScript runtimes. This participation ensures:

  • API interoperability: Code written for Azion Runtime follows the same standards as other major runtimes.
  • Standards alignment: Azion collaborates with WHATWG, W3C, and other standards bodies.
  • Portability: Functions built on WinterTC-compliant APIs work consistently across platforms.

Network APIs

addEventListener

Fetch

FetchEvent

Request

Response

Encoding APIs

Encoding

Web Stream APIs

TransformStream

ReadableStream

WritableStream

ReadableStreamBYOBReader

ReadableStreamDefaultReader

WritableStreamDefaultWriter

Web Standards APIs

URLPattern

StructuredClone

V8 Primitives

WebAssembly

Intl

Web Crypto APIs

Crypto

CryptoKey

SubtleCrypto

EventTarget

EventTarget

EdgeRuntime property

The EdgeRuntime property can be accessed in different ways:

if (typeof EdgeRuntime !== 'string') {
// Your logic here.
}
if (typeof globalThis.EdgeRuntime !== 'string') {
// Your logic here.
}
if (typeof self.EdgeRuntime !== 'string') {
// Your logic here.
}

Supported types

For a complete list of the Azion Runtime supported types, go to Azion Runtime supported types.