Cloudflare Workers では Module Worker Syntax と Service Worker Syntax の２つの記述方式が存在している。
Service Worker Syntax を利用している場合、環境変数はすべてグローバル変数として利用可能になる。
この方法はデバッグ目的とかで使える多分便利な技である。
addEventListener("fetch", (event: FetchEvent) => {
// @ts-ignore
console.log({ ...global });
event.respondWith(new Response("Hello, World!!"));
});
コードを読んで分かる通り、グローバルで扱えるものすべて global 変数に格納されている。これは @cloudflare/workers-types にも定義されていないため @ts-ignore する必要がある。
実行した結果はこんな感じになる。
{/_ more _/}
{
global: ServiceWorkerGlobalScope {},
self: ServiceWorkerGlobalScope {},
addEventListener: [Function: addEventListener],
removeEventListener: [Function: removeEventListener],
dispatchEvent: [Function: dispatchEvent],
console: Object [console] {
log: [Function: log],
warn: [Function: warn],
dir: [Function: dir],
time: [Function: time],
timeEnd: [Function: timeEnd],
timeLog: [Function: timeLog],
trace: [Function: trace],
assert: [Function: assert],
clear: [Function: clear],
count: [Function: count],
countReset: [Function: countReset],
group: [Function: group],
groupEnd: [Function: groupEnd],
table: [Function: table],
debug: [Function: debug],
info: [Function: info],
dirxml: [Function: dirxml],
error: [Function: error],
groupCollapsed: [Function: groupCollapsed],
Console: [Function: Console],
profile: [Function: profile],
profileEnd: [Function: profileEnd],
timeStamp: [Function: timeStamp],
context: [Function: context]
},
setTimeout: [Function (anonymous)],
setInterval: [Function (anonymous)],
clearTimeout: [Function: clearTimeout],
clearInterval: [Function: clearInterval],
queueMicrotask: [Function: queueMicrotask],
scheduler: Scheduler {},
atob: [Function: atob],
btoa: [Function: btoa],
Math: Object [Math] {},
crypto: Crypto {},
CryptoKey: [Function: bound CryptoKey],
TextDecoder: [class TextDecoder],
TextEncoder: [class TextEncoder],
fetch: [AsyncFunction: fetch],
Headers: [class Headers],
Request: [class Request extends Body],
Response: [class Response extends Body],
FormData: [class FormData] { name: 'FormData' },
Blob: [class Blob],
File: [class File extends Blob],
URL: [class URL],
URLSearchParams: [class URLSearchParams],
URLPattern: [class URLPattern],
ByteLengthQueuingStrategy: [class ByteLengthQueuingStrategy],
CountQueuingStrategy: [class CountQueuingStrategy],
ReadableByteStreamController: [class ReadableByteStreamController],
ReadableStream: [class ReadableStream],
ReadableStreamBYOBReader: [class ReadableStreamBYOBReader],
ReadableStreamBYOBRequest: [class ReadableStreamBYOBRequest],
ReadableStreamDefaultController: [class ReadableStreamDefaultController],
ReadableStreamDefaultReader: [class ReadableStreamDefaultReader],
TransformStream: [class TransformStream],
TransformStreamDefaultController: [class TransformStreamDefaultController],
WritableStream: [class WritableStream],
WritableStreamDefaultController: [class WritableStreamDefaultController],
WritableStreamDefaultWriter: [class WritableStreamDefaultWriter],
FixedLengthStream: [class FixedLengthStream extends TransformStream],
Event: [class Event] {
NONE: 0,
CAPTURING_PHASE: 1,
AT_TARGET: 2,
BUBBLING_PHASE: 3
},
EventTarget: [class EventTarget] { [Symbol(nodejs.event_target)]: true },
AbortController: [class AbortController],
AbortSignal: [class AbortSignal extends EventTarget],
FetchEvent: [class FetchEvent extends Event],
ScheduledEvent: [class ScheduledEvent extends Event],
DOMException: [class DOMException2 extends Error] {
INDEX_SIZE_ERR: 1,
DOMSTRING_SIZE_ERR: 2,
HIERARCHY_REQUEST_ERR: 3,
WRONG_DOCUMENT_ERR: 4,
INVALID_CHARACTER_ERR: 5,
NO_DATA_ALLOWED_ERR: 6,
NO_MODIFICATION_ALLOWED_ERR: 7,
NOT_FOUND_ERR: 8,
NOT_SUPPORTED_ERR: 9,
INUSE_ATTRIBUTE_ERR: 10,
INVALID_STATE_ERR: 11,
SYNTAX_ERR: 12,
INVALID_MODIFICATION_ERR: 13,
NAMESPACE_ERR: 14,
INVALID_ACCESS_ERR: 15,
VALIDATION_ERR: 16,
TYPE_MISMATCH_ERR: 17,
SECURITY_ERR: 18,
NETWORK_ERR: 19,
ABORT_ERR: 20,
URL_MISMATCH_ERR: 21,
QUOTA_EXCEEDED_ERR: 22,
TIMEOUT_ERR: 23,
INVALID_NODE_TYPE_ERR: 24,
DATA_CLONE_ERR: 25
},
WorkerGlobalScope: [class WorkerGlobalScope extends ThrowingEventTarget],
structuredClone: [Function: structuredClone],
ArrayBuffer: [Function: ArrayBuffer],
Atomics: Object [Atomics] {},
BigInt64Array: [Function: BigInt64Array],
BigUint64Array: [Function: BigUint64Array],
DataView: [Function: DataView],
Date: [Function: Date],
Float32Array: [Function: Float32Array],
Float64Array: [Function: Float64Array],
Int8Array: [Function: Int8Array],
Int16Array: [Function: Int16Array],
Int32Array: [Function: Int32Array],
Map: [Function: Map],
Set: [Function: Set],
SharedArrayBuffer: [Function: SharedArrayBuffer],
Uint8Array: [Function: Uint8Array],
Uint8ClampedArray: [Function: Uint8ClampedArray],
Uint16Array: [Function: Uint16Array],
Uint32Array: [Function: Uint32Array],
WeakMap: [Function: WeakMap],
WeakSet: [Function: WeakSet],
WebAssembly: Object [WebAssembly] {
compile: [Function: compile],
validate: [Function: validate],
instantiate: [Function: instantiate],
compileStreaming: [Function: compileStreaming],
instantiateStreaming: [Function: instantiateStreaming]
},
MINIFLARE: true,
caches: CacheStorage {},
HTMLRewriter: [class HTMLRewriter],
MessageEvent: [class MessageEvent extends Event],
CloseEvent: [class CloseEvent extends Event],
WebSocketPair: [Function: WebSocketPair],
WebSocket: [class WebSocket extends InputGatedEventTarget],
PROJECT_ID: 'example-project12345',
kv_namespaces: [ { binding: 'KV', id: '', preview_id: '' } ],
tsconfig: './tsconfig.json'
}