带有可选第一路由参数的Vue路由器路由

Question

我有一个路由列表，这些路由都可以具有可选的第一个参数。如果该参数存在于网址中，它将更改我在api调用中使用的标头。其他所有内容保持不变。除了创建两组路由来处理此问题之外，还有没有办法我可以将第一个参数列出为可选参数，并且只定义一次我的路由？

let routes = [
{
    //for this route path and all the others, there can be an :environment param present in the front (/:environment/:event_identifier/register/pages/:page_uuid) or it can be (/:event_identifier/register/pages/:page_uuid)
    //everything else about this and the other routes will remain the same
    path: '/:event_identifier/register/pages/:page_uuid',
    name: 'ContentPage',
    component: ContentPage,
    meta: {
        requiresAuth: true,
    },
},
{
    path: '/:event_identifier/register/:pagenum',
    name: 'Register',
    component: Register,
    meta: {
        requiresAuth: true,
    },
},
{
    path: '/:event_identifier',
    name: 'Login',
    component: Login,
    children: [
        {
            path: '/:event_identifier/:registration_uuid/:pagenum',
            name: 'editRegistration',
            component: Login,
        },
    ],
},
]