route()生成url没有成功映射路由的[可选]规则

class Index extends Base
{
    public function index($id,$name='web')
    {
        return view('index/index',['data'=>['id'=>$id, 'name'=>$name,]]);
    }

Route::get('/{id}[/{name}]', [app\controller\Index::class, 'index'])->name('index/index');

index/index.html
{:route('index/index', ['id' => $data.id,'name' => $data.name])}
{:route('index/index', ['id' => $data.id])}

http://webman.com/123/webman
实际生成 /123/webman

http://webman.com/123
实际生成 /123/{name}    //这不是我希望的结果