Function checkEvolution

checkEvolution<S>(rules: readonly EvolutionRule<S>[], level: number): S | null
The last rule whose condition holds at this level, or null when none does - the same "ordered low to high, most-specific-that-matches wins" convention mwg/rpg's event pages use, so a chain authored [16 -> adult, 32 -> elder] reaches "elder" at level 40 rather than getting stuck on the first threshold it ever crossed.
Type Parameters
- S
Parameters
- rules: readonly EvolutionRule<S>[]
- level: number
Returns S | null
Example
```
import { checkEvolution, type EvolutionRule } from '@datamoc/mw_games/battle';

const rules: EvolutionRule<string>[] = [
  { at: (level) => level >= 16, into: 'adult-form' },
  { at: (level) => level >= 32, into: 'elder-form' },
];

const evolvedInto = checkEvolution(rules, 40); // 'elder-form'
```
- Defined in src/battle/Evolution.ts:35