fix(package): allow require() for commonjs use (#565)

* fix(package): allow require() for commonjs use

* test for commonjs

Author: saschanaz

.gitignore

@@ -1,2 +1,3 @@
 node_modules/
-dist/
+dist/*
+!dist/package.json

dist/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "commonjs"
+}

package.json

@@ -35,7 +35,10 @@
   },
   "repository": "git://github.com/w3c/webidl2.js",
   "main": "dist/webidl2.js",
-  "exports": "./index.js",
+  "exports": {
+    "import": "./index.js",
+    "require": "./dist/webidl2.js"
+  },
   "type": "module",
   "files": [
     "dist/*",

test/commonjs.cjs

@@ -0,0 +1,8 @@
+const expect = require("expect");
+const webidl2 = require("webidl2");
+
+describe("CommonJS import", () => {
+  it("require() gets the relevant items", () => {
+    expect(webidl2.parse).toBeTruthy();
+  });
+});