target node 20 (oldest supported release)

main.js

@@ -0,0 +1,26 @@
+// @ts-check
+import * as fs from "node:fs";
+const globalRegex = /    (?:var|function) (\w+)/g;
+const globalSymbols = [];
+let buffer = '';
+for (const basename of fs.readdirSync("node_modules/@types/node/web-globals")) {
+    buffer += fs.readFileSync("node_modules/@types/node/web-globals/" + basename, "utf8");
+}
+for (const match of buffer.matchAll(globalRegex)) {
+    globalSymbols.push(match[0].trim());
+}
+const declarationRegex = /(?:^\/\*\*[\s\S]+?\*\/\n)?^(interface|type|declare \w+) (\w+).+\n(?:(?: .+\n)*};?\n)?/gm;
+const importableTypes = new Set();
+buffer = '';
+for (const match of fs.readFileSync("node_modules/@types/web/index.d.ts", "utf8").matchAll(declarationRegex)) {
+    if (!match[1].startsWith("declare")) {
+        importableTypes.add(match[2]);
+        continue;
+    }
+    if (globalSymbols.includes(match[1].replace("declare ", "") + " " + match[2])) {
+        buffer += match[0].replace(/^declare /gm, "").replaceAll("\n", "\n\t");
+    }
+}
+buffer = `import type { \n\t${Array.from(importableTypes).join(",\n\t")}\n} from "@sugoidogo/importable-types-web"\ndeclare global {\n\t${buffer.trimEnd()}\n}`;
+fs.writeFileSync("index.d.ts", buffer, "utf8");
+fs.copyFileSync("node_modules/@types/web/LICENSE.txt", "LICENSE.txt");