fix(std/node): correct typings for global, globalThis, window (#8363)

1 files changed, 28 insertions, 0 deletions

diff --git a/std/node/global.d.ts b/std/node/global.d.ts
new file mode 100644
index 000000000..b02a682c6
--- /dev/null
+++ b/std/node/global.d.ts
@@ -0,0 +1,28 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { process as processModule } from "./process.ts";
+import { Buffer as bufferModule } from "./buffer.ts";
+
+// d.ts files allow us to declare Buffer as a value and as a type
+// type something = Buffer | something_else; is quite common
+
+type GlobalType = {
+  process: typeof processModule;
+  Buffer: typeof bufferModule;
+};
+
+declare global {
+  interface Window {
+    global: GlobalType;
+  }
+
+  interface globalThis {
+    global: GlobalType;
+  }
+
+  var global: GlobalType;
+  var process: typeof processModule;
+  var Buffer: typeof bufferModule;
+  type Buffer = bufferModule;
+}
+
+export {};