模板联合类型
模板联合类型可用于合并和操作类型系统内的文本，例如：
type Status = 'active' | 'inactive';type Products = 'p1' | 'p2';type ProductId = `id-${Products}-${Status}`; // "id-p1-active" | "id-p1-inactive" | "id-p2-active" | "id-p2-inactive"模板联合类型可用于合并和操作类型系统内的文本，例如：
type Status = 'active' | 'inactive';type Products = 'p1' | 'p2';type ProductId = `id-${Products}-${Status}`; // "id-p1-active" | "id-p1-inactive" | "id-p2-active" | "id-p2-inactive"