Revert breaking changes from 3.3.0

.gitignore

@@ -137,7 +137,6 @@ typings/
 
 ### Project
 /dist/
+!/dist/types/ts3.6/polyfill.d.ts
 /lib/
 /temp/
-/types/ponyfill.d.ts
-/types/tsdoc-metadata.json

CHANGELOG.md

@@ -10,12 +10,17 @@
 > - 🏠 Internal
 > - 💅 Polish
 
+## Unreleased
+
+* 🐛 Revert `engines` bump in `package.json`. ([#137](https://github.com/MattiasBuelens/web-streams-polyfill/issues/137), [#138](https://github.com/MattiasBuelens/web-streams-polyfill/pull/138))
+* 🐛 Re-introduce support for TypeScript 3.6 and below. ([#137](https://github.com/MattiasBuelens/web-streams-polyfill/issues/137), [#138](https://github.com/MattiasBuelens/web-streams-polyfill/pull/138))
+
 ## 3.3.0 (2024-01-04)
 
 * 🚀 Added global augmentations for `ReadableStream` to the polyfill's type definitions. ([#130](https://github.com/MattiasBuelens/web-streams-polyfill/pull/130))
   * This allows TypeScript users to use new methods such as `ReadableStream.prototype[Symbol.asyncIterator]()`,
     even when TypeScript doesn't yet have a built-in type definition for them.
-* 💥 The type definitions now require TypeScript 3.5 or higher. ([#130](https://github.com/MattiasBuelens/web-streams-polyfill/pull/130))
+* ~~💥 The type definitions now require TypeScript 3.6 or higher. ([#130](https://github.com/MattiasBuelens/web-streams-polyfill/pull/130))~~ (Reverted in version 3.3.1)
 * 👓 Align with [spec version `4dc123a`](https://github.com/whatwg/streams/tree/4dc123a6e7f7ba89a8c6a7975b021156f39cab52/) ([#115](https://github.com/MattiasBuelens/web-streams-polyfill/issues/115), [#134](https://github.com/MattiasBuelens/web-streams-polyfill/pull/134))
   * Added `ReadableStream.from(asyncIterable)`, which creates a `ReadableStream` wrapping the given iterable or async iterable.
     This can also be used to wrap a native `ReadableStream` (e.g. a `Response.body` from `fetch()`),

api-extractor.json

@@ -195,7 +195,7 @@
      * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
      * DEFAULT VALUE: "<projectFolder>/dist/<unscopedPackageName>.d.ts"
      */
-    "untrimmedFilePath": "<projectFolder>/types/ponyfill.d.ts",
+    "untrimmedFilePath": "<projectFolder>/dist/types/ts3.6/ponyfill.d.ts",
 
     /**
      * Specifies the output path for a .d.ts rollup file to be generated with trimming for a "beta" release.
@@ -242,7 +242,7 @@
      *
      * DEFAULT VALUE: true
      */
-    // "enabled": true,
+    "enabled": true,
     /**
      * Specifies where the TSDoc metadata file should be written.
      *
@@ -256,9 +256,8 @@
      * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
      * DEFAULT VALUE: "<lookup>"
      */
-    // "tsdocMetadataFilePath": "<projectFolder>/dist/tsdoc-metadata.json"
+    "tsdocMetadataFilePath": "<projectFolder>/dist/types/tsdoc-metadata.json"
   },
-
   /**
    * Specifies what type of newlines API Extractor should use when writing output files.  By default, the output files
    * will be written with Windows-style newlines.  To use POSIX-style newlines, specify "lf" instead.

build/downlevel-dts.js

@@ -0,0 +1,28 @@
+// Based on downlevel-dts (MIT licensed) by Nathan Shively-Sanders
+// https://github.com/sandersn/downlevel-dts/blob/e7d1cb5aced5686826fe8aac4d4af2f745a9ef60/index.js
+
+const { Project } = require('ts-morph');
+const path = require('path');
+
+const project = new Project();
+const inputDir = project.addDirectoryAtPath(path.join(__dirname, '../dist/types/'));
+
+// Down-level all *.d.ts files in input directory
+const files = inputDir.addSourceFilesAtPaths('*.d.ts');
+for (const file of files) {
+  downlevelTS34(file);
+}
+project.saveSync();
+
+/**
+ * Down-level TypeScript 3.4 types in the given source file
+ */
+function downlevelTS34(f) {
+  // Replace "es2018.asynciterable" with "esnext.asynciterable" in lib references
+  const refs = f.getLibReferenceDirectives();
+  for (const r of refs) {
+    if (r.getFileName() === 'es2018.asynciterable') {
+      f.replaceText([r.getPos(), r.getEnd()], 'esnext.asynciterable');
+    }
+  }
+}

es2018/package.json

@@ -3,5 +3,12 @@
   "main": "../dist/polyfill.es2018",
   "browser": "../dist/polyfill.es2018.min.js",
   "module": "../dist/polyfill.es2018.mjs",
-  "types": "../types/polyfill.d.ts"
+  "types": "../dist/types/polyfill.d.ts",
+  "typesVersions": {
+    ">=3.6": {
+      "../dist/types/*": [
+        "../dist/types/ts3.6/*"
+      ]
+    }
+  }
 }

es6/package.json

@@ -3,5 +3,12 @@
   "main": "../dist/polyfill.es6",
   "browser": "../dist/polyfill.es6.min.js",
   "module": "../dist/polyfill.es6.mjs",
-  "types": "../types/polyfill.d.ts"
+  "types": "../dist/types/polyfill.d.ts",
+  "typesVersions": {
+    ">=3.6": {
+      "../dist/types/*": [
+        "../dist/types/ts3.6/*"
+      ]
+    }
+  }
 }