fix: Make std work with isolatedModules (#7016)

docs/getting_started/typescript.md

@@ -30,9 +30,9 @@ information. For this purpose TypeScript provides the
 To export a type in a different file use
 `export type { AnInterface } from "./mod.ts";`. To import a type use
 `import type { AnInterface } from "./mod.ts";`. You can check that you are using
-`import type` and `export type` where necessary by setting the
-`importsNotUsedAsValues` TypeScript compiler option to `"error"`. You can see an
-example `tsconfig.json` with this option
+`import type` and `export type` where necessary by setting the `isolatedModules`
+TypeScript compiler option to `true`. You can see an example `tsconfig.json`
+with this option
 [in the standard library](https://github.com/denoland/deno/blob/master/std/tsconfig_test.json).
 
 Because there is no type information when using `--no-check`, `const enum` is

std/log/logger.ts

@@ -3,8 +3,8 @@ import {
   LogLevels,
   getLevelByName,
   getLevelName,
-  LevelName,
 } from "./levels.ts";
+import type { LevelName } from "./levels.ts";
 import type { BaseHandler } from "./handlers.ts";
 
 export interface LogRecordOptions {

std/log/mod.ts

@@ -10,7 +10,8 @@ import {
 import { assert } from "../_util/assert.ts";
 import type { LevelName } from "./levels.ts";
 
-export { LogLevels, LevelName } from "./levels.ts";
+export { LogLevels } from "./levels.ts";
+export type { LevelName } from "./levels.ts";
 export { Logger } from "./logger.ts";
 
 export class LoggerConfig {

std/node/global.ts

@@ -7,3 +7,5 @@ Object.defineProperty(globalThis, Symbol.toStringTag, {
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 (globalThis as any)["global"] = globalThis;
+
+export {};

std/tsconfig_test.json

@@ -1,5 +1,5 @@
 {
   "compilerOptions": {
-    "importsNotUsedAsValues": "error"
+    "isolatedModules": true
   }
 }