Throw user-friendly error message on undefined input

Fixes #23
sindresorhus · Nov 25, 2023 · d38670e · d38670e
1 parent dda3441
commit d38670e
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Showing 4 changed files with 8 additions and 6 deletions.
diff --git a/.github/funding.yml b/.github/funding.yml
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
@@ -14,8 +14,8 @@ jobs:
           - 18
           - 16
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

diff --git a/index.js b/index.js
@@ -2,6 +2,10 @@ import {Readable as ReadableStream} from 'node:stream';
 import {Buffer} from 'node:buffer';
 
 function baseIntoStream(isObjectMode, input) {
+	if (input === undefined || input === null) {
+		throw new TypeError('Input should not be undefined or null.');
+	}
+
 	async function * reader() {
 		let value = await input;
 

diff --git a/package.json b/package.json
@@ -12,6 +12,8 @@
 	},
 	"type": "module",
 	"exports": "./index.js",
+	"types": "./index.d.ts",
+	"sideEffects": false,
 	"engines": {
 		"node": ">=16"
 	},