fix: prevent ReferenceError, update compatibility to ES2020 and Node …

…18+ (#356)

README.md

@@ -313,7 +313,7 @@ TypeScript >= 4.5 is supported.
 
 The following runtimes are supported:
 
-- Node.js 16 LTS or later ([non-EOL](https://endoflife.date/nodejs)) versions.
+- Node.js 18 LTS or later ([non-EOL](https://endoflife.date/nodejs)) versions.
 - Deno v1.28.0 or higher, using `import OpenAI from "npm:openai"`.
 - Bun 1.0 or later.
 - Cloudflare Workers.

package.json

@@ -82,6 +82,7 @@
     "prepublishOnly": "echo 'to publish, run yarn build && (cd dist; yarn publish)' && exit 1",
     "format": "prettier --write --cache  --cache-strategy metadata . !dist",
     "tsn": "ts-node -r tsconfig-paths/register",
+    "lint": "eslint --ext ts,js .",
     "fix": "eslint --fix --ext ts,js ."
   },
   "dependencies": {

src/_shims/node-runtime.ts

@@ -59,8 +59,8 @@ async function getMultipartRequestOptions<T extends {} = Record<string, unknown>
 export function getRuntime(): Shims {
   // Polyfill global object if needed.
   if (typeof AbortController === 'undefined') {
-    // @ts-ignore
-    AbortController = AbortControllerPolyfill;
+    // @ts-expect-error (the types are subtly different, but compatible in practice)
+    globalThis.AbortController = AbortControllerPolyfill;
   }
   return {
     kind: 'node',

tsconfig.json

@@ -2,7 +2,7 @@
   "include": ["src", "tests", "examples"],
   "exclude": ["src/_shims/**/*-deno.ts"],
   "compilerOptions": {
-    "target": "es2019",
+    "target": "es2020",
     "lib": ["es2020"],
     "module": "commonjs",
     "moduleResolution": "node",