Add browser.d.ts and check for existence of Error.captureStackTrace()

browser.d.ts

@@ -0,0 +1,5 @@
+import {YargsFactory} from './build/lib/yargs-factory';
+
+declare const Yargs: ReturnType<typeof YargsFactory>;
+
+export default Yargs;

lib/yerror.ts

@@ -2,6 +2,8 @@ export class YError extends Error {
   name = 'YError';
   constructor(msg?: string | null) {
     super(msg || 'yargs error');
-    Error.captureStackTrace(this, YError);
+    if (Error.captureStackTrace) {
+      Error.captureStackTrace(this, YError);
+    }
   }
 }

package.json

@@ -16,6 +16,10 @@
       "import": "./helpers/helpers.mjs",
       "require": "./helpers/index.js"
     },
+    "./browser": {
+      "import": "./browser.mjs",
+      "types": "./browser.d.ts"
+    },
     "./yargs": [
       {
         "require": "./yargs"