Add version to navigator.userAgent

A la Deno and Bun.

Author: saghul

qjs.c

@@ -164,6 +164,11 @@ static JSContext *JS_NewCustomContext(JSRuntime *rt)
     JSValue global = JS_GetGlobalObject(ctx);
     JS_SetPropertyFunctionList(ctx, global, global_obj, countof(global_obj));
     JS_SetPropertyFunctionList(ctx, global, &argv0, 1);
+    JSValue navigator = JS_NewObject(ctx);
+    char version[32];
+    snprintf(version, sizeof(version), "quickjs-ng/%s", JS_GetVersion());
+    JS_DefinePropertyValueStr(ctx, navigator, "userAgent", JS_NewString(ctx, version), JS_PROP_ENUMERABLE);
+    JS_DefinePropertyValueStr(ctx, global, "navigator", navigator, JS_PROP_C_W_E);
     JS_FreeValue(ctx, global);
 
     return ctx;