# Route pages in the browser without reloading
> Register client-side routes with ROUTE(), navigate with REDIRECT(), read the URL parameters and the query string from NAV, and go back in the history.
Framework: jcomponent20
Product: jComponent 20 (jcomponent@20)
Language: en
Content-SHA256: 0653d2df8ce5713c551c0651206dcb143244d26558dd299359751f41b40ae700
Snapshot: c0700e321579725c5cf4f5ace1ad7d2866d1b4f93c24a63c0b41b6b7998e976c
Sources: jcomponent20@3fedd009a277f50fddc608b97afbec553b67c51b
Review: not-recorded
jComponent has its own router for single page applications. `ROUTE(url, fn)` registers a route: `{name}` segments are passed to `fn` as arguments in order. `REDIRECT(url)` changes the address with the History API (no page load) and runs the route that matches. Routes are compared segment by segment: a route and a URL must have the same number of segments, and `*` matches any value at its position. `NAV` describes the current location: `NAV.url` is the path, `NAV.query` the parsed query string and `NAV.params` the route arguments. `NAV.back()` and `NAV.forward()` move through the history that jComponent keeps.
For the server this is still one page, so every URL below your app has to return the same HTML (a `ROUTE('GET /*')` that renders the shell), otherwise a reload on `/users/5/` would give a 404.
```html public/index.html
jComponent
```