utcOffset Interface error

[XuCui123]

I am using utcOffset in TypeScript project, but the interface of utcOffset may be error.

dayjs()
            .utcOffset(timeZone)
            .add(4, 'y')
            .format(patten);

node_modules/dayjs/index.d.ts utcOffset(): number

[XuCui123]

error TS2554: Expected 0 arguments, but got 1. .utcOffset(timeZone)

error TS2339: Property 'format' does not exist on type 'number'. .format(patten);