Function tryRoute

http/unstable_route.ts:349–357

* Try a single route as a candidate. Updates `state` in place when the * route matches and has a lower insertion index than the current best.

(state: MatchState, r: IndexedRoute)

   * route matches and has a lower insertion index than the current best.
   */
  function tryRoute(state: MatchState, r: IndexedRoute): void {
    if (r.index >= state.bestIndex) return;
    if (!methodMatches(r.route.method, state.request.method)) return;
    const params = r.route.pattern.exec(state.request.url);
    if (!params) return;
    state.bestRoute = r.route;
    state.bestIndex = r.index;
    state.bestParams = params;
  }

  /**
   * Walk the tree in lockstep with the pathname. `from` is the index of the