close #2994: use deno types for type checking

.gitignore

@@ -6,6 +6,7 @@
 /deno/
 /esbuild
 /github/
+/lib/deno/lib.deno.d.ts
 /npm/@esbuild/android-arm/esbuild.wasm
 /npm/@esbuild/android-arm/wasm_exec_node.js
 /npm/@esbuild/android-arm/wasm_exec.js

Makefile

@@ -107,10 +107,17 @@ test-old-ts: platform-neutral | require/old-ts/node_modules
 node-unref-tests: | scripts/node_modules
 	node scripts/node-unref-tests.js
 
-lib-typecheck: | lib/node_modules
+lib-typecheck: lib-typecheck-node lib-typecheck-deno
+
+lib-typecheck-node: | lib/node_modules
 	cd lib && node_modules/.bin/tsc -noEmit -p tsconfig.json
+
+lib-typecheck-deno: lib/deno/lib.deno.d.ts | lib/node_modules
 	cd lib && node_modules/.bin/tsc -noEmit -p tsconfig-deno.json
 
+lib/deno/lib.deno.d.ts:
+	deno types > lib/deno/lib.deno.d.ts
+
 # End-to-end tests
 test-e2e: test-e2e-npm test-e2e-pnpm test-e2e-yarn-berry test-e2e-deno
 

lib/deno/external.d.ts

@@ -1,3 +1,6 @@
 declare module "https://deno.land/x/denoflate@1.2.1/mod.ts" {
   export function gunzip(input: Uint8Array): Uint8Array
 }
+
+// This is used by "worker.ts"
+declare let onmessage: (event: any) => void