feat: support cloudflare module workers

BREAKING: one must `enable()` and not assume an ambiant environment variable

readme.md

@@ -81,9 +81,28 @@ DEBUG=scopeA:two,scopeB:* node example.js
 
 #### _workers_
 
-Create an [Environment Variable](https://developers.cloudflare.com/workers/platform/environments) with `DEBUG`.
+As of version v0.3.0 to enable log events you must use the `enable` programmatic api, this is due to Module Workers no
+longer offering global environment variables, and instead they are injected through an api.
 
-> ⚠️ Specifically referencing the Cloudflare Workers
+Ambiant logs do however need to be statically enabled. (put a `enable()` in module scope).
+
+<details><summary>Example</summary>
+
+```ts
+import { diary, enable } from 'diary';
+
+const logger = diary('my-worker');
+
+export default {
+  async fetch(req, env, context) {
+    enable(env.DEBUG);
+
+    logger.info('request for', req.url);
+  },
+};
+```
+
+</details>
 
 #### _programmatic_
 

src/index.ts

@@ -53,16 +53,16 @@ export const enable = (allows_query: string) => {
 };
 
 // read `localstorage`/`env` for scope "name"s allowed to log
-enable(
-	(__TARGET__ === 'node'
-		? process.env.DEBUG
-		: __TARGET__ === 'browser'
-		? localStorage.getItem('DEBUG')
-		: __TARGET__ === 'worker'
-		? DEBUG
-		: null
-	) || 'a^',
-);
+if (__TARGET__ !== 'worker') {
+	enable(
+		(__TARGET__ === 'node'
+			? process.env.DEBUG
+			: __TARGET__ === 'browser'
+				? localStorage.getItem('DEBUG')
+				: null
+		) || 'a^',
+	);
+}
 
 // ~ Logger