Function contextKeyFor

contextKeyFor<T>(name: string, defaultValue: T): RouterContextKey<T>
Returns the context key for a name, creating it on first use.

Use this instead of writing { defaultValue: … } by hand whenever a key is SET in one module and READ in another that a bundler may duplicate — which, in a framework-mode application, is every key an application declares for itself. Both sides resolve the name through this module, so they receive the identical object however many times their own modules are copied.

That only holds while this package is a single module instance. In a scaffolded project it is: the server build treats @setu-ts/* as external, so the bundle imports this module at runtime rather than inlining a second copy of it.
Type Parameters
- T
  The value the key carries
Parameters
- name: string
  A stable, application-wide unique name for the key
- defaultValue: T
  Returned by context.get() before anything sets the key. Required, because React Router throws for an unset key that has none.
Returns RouterContextKey<T>
The key for that name — the same object on every call
Example: An application-declared key, set in `setu.config.ts` and read in a loader
```
import { contextKeyFor } from '@setu-ts/react-router-plugin';
import type { ISession } from '@setu-ts/common';

export const sessionContext = contextKeyFor<ISession | null>('session', null);
```
Since
0.2.0
- Defined in packages/react-router-plugin/src/handler/context-keys.ts:96