Method set

packages/tailwindcss/src/variants.ts:281–313

(
    name: string,
    {
      kind,
      applyFn,
      compounds,
      compoundsWith,
      order,
    }: {
      kind: T
      applyFn: VariantFn<T>
      compoundsWith: Compounds
      compounds: Compounds
      order?: number
    },
  )

  }

  private set<T extends Variant['kind']>(
    name: string,
    {
      kind,
      applyFn,
      compounds,
      compoundsWith,
      order,
    }: {
      kind: T
      applyFn: VariantFn<T>
      compoundsWith: Compounds
      compounds: Compounds
      order?: number
    },
  ) {
    let existing = this.variants.get(name)
    if (existing) {
      Object.assign(existing, { kind, applyFn, compounds })
    } else {
      if (order === undefined) {
        this.lastOrder = this.nextOrder()
        order = this.lastOrder
      }
      this.variants.set(name, {
        kind,
        applyFn,
        order,
        compoundsWith,
        compounds,
      })
    }
  }

  private nextOrder() {
    return this.groupOrder ?? this.lastOrder + 1