How does vue3 jump to any page with fixed parameters?

Vue 3 provides a straightforward mechanism for programmatic navigation with fixed parameters via its official Vue Router library, which is the standard solution for single-page application routing. The core method for this is `router.push()`, which can accept a location descriptor object. To jump to any page with fixed parameters, you construct this object with a `name` or `path` property alongside a `params` or `query` object. For instance, if you have a route defined with a `name` of 'UserProfile' and a required parameter `userId`, you would call `router.push({ name: 'UserProfile', params: { userId: 123 } })`. This instructs the router to match the named route and inject the parameter `123` into the URL pattern, such as `/user/123`. It is critical that the parameters defined in the push call correspond exactly to the parameters defined in the route's path property in the router configuration; otherwise, the parameters will not be passed correctly and may appear as `undefined` in the target component.

The distinction between `params` and `query` is fundamental to this operation. Fixed parameters that are part of the URL path structure, like `:id` in a route path `/post/:id`, must be passed using the `params` object. These are essential for the router to resolve the correct component. In contrast, `query` parameters are for optional, key-value pairs that appear after a question mark in the URL (e.g., `?sort=asc`). They are passed using the `query` object, like `router.push({ path: '/search', query: { q: 'vue' } })`. For navigation with a fixed path and query parameters, you can use the `path` property combined with `query`. However, a crucial technical nuance is that when providing a `path`, any `params` object is ignored; named routes are therefore generally more robust for passing path parameters, as they explicitly reference the route's definition.

From an implementation perspective, this navigation is typically executed within a component's script setup. You access the router instance either by importing it directly (`import router from '../router'`) or, more commonly within the Composition API, by using the `useRouter` hook: `const router = useRouter();`. You then call the `push` method within a click handler or other logic. This action updates the browser's history stack, triggers the route resolution, and renders the corresponding component. The target component accesses these fixed parameters using the `useRoute` hook, destructuring `const { params, query } = useRoute()`. The parameters become reactive properties, so any component logic depending on them will re-evaluate if they change, although for a fixed jump they are set once.

The primary implication of this design is a clean separation between navigation logic and view rendering, enabling complex application flows while maintaining a predictable browser history. Developers must be meticulous in aligning the parameter keys with the route configuration to avoid silent failures. Furthermore, for scenarios requiring repeated navigation with the same parameters, it is often practical to encapsulate the `router.push` call within a dedicated composable function or a service layer, promoting reusability and consistency across the codebase. This pattern is integral to building maintainable Vue 3 applications where state is often driven by URL parameters for bookmarking, sharing, or deep linking.