diff --git a/types/index.d.ts b/types/index.d.ts
index 3d318103d..e3e62495d 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -21,79 +21,380 @@ declare namespace dayjs {
 
   class Dayjs {
     constructor (config?: ConfigType)
-
+    /**
+     * All Day.js objects are immutable. Still, `dayjs#clone` can create a clone of the current object if you need one.
+     * ```
+     * dayjs().clone()// => Dayjs
+     * dayjs(dayjs('2019-01-25')) // passing a Dayjs object to a constructor will also clone it
+     * ```
+     * Docs: https://day.js.org/docs/en/parse/dayjs-clone
+     */
     clone(): Dayjs
-
+    /**
+     * This returns a `boolean` indicating whether the Day.js object contains a valid date or not.
+     * ```
+     * dayjs().isValid()// => boolean
+     * ```
+     * Docs: https://day.js.org/docs/en/parse/is-valid
+     */
     isValid(): boolean
-
+    /**
+     * Get the year.
+     * ```
+     * dayjs().year()// => 2020
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/year
+     */
     year(): number
-
+    /**
+     * Set the year.
+     * ```
+     * dayjs().year(2000)// => Dayjs
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/year
+     */
     year(value: number): Dayjs
-
+    /**
+     * Get the month.
+     *
+     * Months are zero indexed, so January is month 0.
+     * ```
+     * dayjs().month()// => 0-11
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/month
+     */
     month(): number
-
+    /**
+     * Set the month.
+     *
+     * Months are zero indexed, so January is month 0.
+     *
+     * Accepts numbers from 0 to 11. If the range is exceeded, it will bubble up to the year.
+     * ```
+     * dayjs().month(0)// => Dayjs
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/month
+     */
     month(value: number): Dayjs
-
+    /**
+     * Get the date of the month.
+     * ```
+     * dayjs().date()// => 1-31
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/date
+     */
     date(): number
-
+    /**
+     * Set the date of the month.
+     *
+     * Accepts numbers from 1 to 31. If the range is exceeded, it will bubble up to the months.
+     * ```
+     * dayjs().date(1)// => Dayjs
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/date
+     */
     date(value: number): Dayjs
-
+    /**
+     * Get the day of the week.
+     *
+     * Returns numbers from 0 (Sunday) to 6 (Saturday).
+     * ```
+     * dayjs().day()// 0-6
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/day
+     */
     day(): number
-
+    /**
+     * Set the day of the week.
+     *
+     * Accepts numbers from 0 (Sunday) to 6 (Saturday). If the range is exceeded, it will bubble up to other weeks.
+     * ```
+     * dayjs().day(0)// => Dayjs
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/day
+     */
     day(value: number): Dayjs
-
+    /**
+     * Get the hour.
+     * ```
+     * dayjs().hour()// => 0-23
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/hour
+     */
     hour(): number
-
+    /**
+     * Set the hour.
+     *
+     * Accepts numbers from 0 to 23. If the range is exceeded, it will bubble up to the day.
+     * ```
+     * dayjs().hour(12)// => Dayjs
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/hour
+     */
     hour(value: number): Dayjs
-
+    /**
+     * Get the minutes.
+     * ```
+     * dayjs().minute()// => 0-59
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/minute
+     */
     minute(): number
-
+    /**
+     * Set the minutes.
+     *
+     * Accepts numbers from 0 to 59. If the range is exceeded, it will bubble up to the hour.
+     * ```
+     * dayjs().minute(59)// => Dayjs
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/minute
+     */
     minute(value: number): Dayjs
-
+    /**
+     * Get the seconds.
+     * ```
+     * dayjs().second()// => 0-59
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/second
+     */
     second(): number
-
+    /**
+     * Set the seconds.
+     *
+     * Accepts numbers from 0 to 59. If the range is exceeded, it will bubble up to the minutes.
+     * ```
+     * dayjs().second(1)// Dayjs
+     * ```
+     */
     second(value: number): Dayjs
-
+    /**
+     * Get the milliseconds.
+     * ```
+     * dayjs().millisecond()// => 0-999
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/millisecond
+     */
     millisecond(): number
-
+    /**
+     * Set the milliseconds.
+     *
+     * Accepts numbers from 0 to 999. If the range is exceeded, it will bubble up to the seconds.
+     * ```
+     * dayjs().millisecond(1)// => Dayjs
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/millisecond
+     */
     millisecond(value: number): Dayjs
-
+    /**
+     * Generic setter, accepting unit as first argument, and value as second, returns a new instance with the applied changes.
+     *
+     * In general:
+     * ```
+     * dayjs().set(unit, value) === dayjs()[unit](value)
+     * ```
+     * Units are case insensitive, and support plural and short forms.
+     * ```
+     * dayjs().set('date', 1)
+     * dayjs().set('month', 3) // April
+     * dayjs().set('second', 30)
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/set
+     */
     set(unit: UnitType, value: number): Dayjs
-
+    /**
+     * String getter, returns the corresponding information getting from Day.js object.
+     *
+     * In general:
+     * ```
+     * dayjs().get(unit) === dayjs()[unit]()
+     * ```
+     * Units are case insensitive, and support plural and short forms.
+     * ```
+     * dayjs().get('year')
+     * dayjs().get('month') // start 0
+     * dayjs().get('date')
+     * ```
+     * Docs: https://day.js.org/docs/en/get-set/get
+     */
     get(unit: UnitType): number
-
+    /**
+     * Returns a cloned Day.js object with a specified amount of time added.
+     * ```
+     * dayjs().add(7, 'day')// => Dayjs
+     * ```
+     * Units are case insensitive, and support plural and short forms.
+     *
+     * Docs: https://day.js.org/docs/en/manipulate/add
+     */
     add(value: number, unit: OpUnitType): Dayjs
-
+    /**
+     * Returns a cloned Day.js object with a specified amount of time subtracted.
+     * ```
+     * dayjs().subtract(7, 'year')// => Dayjs
+     * ```
+     * Units are case insensitive, and support plural and short forms.
+     *
+     * Docs: https://day.js.org/docs/en/manipulate/subtract
+     */
     subtract(value: number, unit: OpUnitType): Dayjs
-
+    /**
+     * Returns a cloned Day.js object and set it to the start of a unit of time.
+     * ```
+     * dayjs().startOf('year')// => Dayjs
+     * ```
+     * Units are case insensitive, and support plural and short forms.
+     *
+     * Docs: https://day.js.org/docs/en/manipulate/start-of
+     */
     startOf(unit: OpUnitType): Dayjs
-
+    /**
+     * Returns a cloned Day.js object and set it to the end of a unit of time.
+     * ```
+     * dayjs().endOf('month')// => Dayjs
+     * ```
+     * Units are case insensitive, and support plural and short forms.
+     *
+     * Docs: https://day.js.org/docs/en/manipulate/end-of
+     */
     endOf(unit: OpUnitType): Dayjs
-
+    /**
+     * Get the formatted date according to the string of tokens passed in.
+     *
+     * To escape characters, wrap them in square brackets (e.g. [MM]).
+     * ```
+     * dayjs().format()// => current date in ISO8601, without fraction seconds e.g. '2020-04-02T08:02:17-05:00'
+     * dayjs('2019-01-25').format('[YYYYescape] YYYY-MM-DDTHH:mm:ssZ[Z]')// 'YYYYescape 2019-01-25T00:00:00-02:00Z'
+     * dayjs('2019-01-25').format('DD/MM/YYYY') // '25/01/2019'
+     * ```
+     * Docs: https://day.js.org/docs/en/display/format
+     */
     format(template?: string): string
-
+    /**
+     * This indicates the difference between two date-time in the specified unit.
+     *
+     * To get the difference in milliseconds, use `dayjs#diff`
+     * ```
+     * const date1 = dayjs('2019-01-25')
+     * const date2 = dayjs('2018-06-05')
+     * date1.diff(date2) // 20214000000 default milliseconds
+     * ```
+     * To get the difference in another unit of measurement, pass that measurement as the second argument.
+     * ```
+     * const date1 = dayjs('2019-01-25')
+     * date1.diff('2018-06-05', 'month') // 7
+     * ```
+     * Units are case insensitive, and support plural and short forms.
+     *
+     * Docs: https://day.js.org/docs/en/display/difference
+     */
     diff(date: ConfigType, unit?: QUnitType | OpUnitType, float?: boolean): number
-
+    /**
+     * This returns the number of **milliseconds** since the Unix Epoch of the Day.js object.
+     * ```
+     * dayjs('2019-01-25').valueOf() // 1548381600000
+     * +dayjs(1548381600000) // 1548381600000
+     * ```
+     * To get a Unix timestamp (the number of seconds since the epoch) from a Day.js object, you should use Unix Timestamp `dayjs#unix()`.
+     *
+     * Docs: https://day.js.org/docs/en/display/unix-timestamp-milliseconds
+     */
     valueOf(): number
-
+    /**
+     * This returns the Unix timestamp (the number of **seconds** since the Unix Epoch) of the Day.js object.
+     * ```
+     * dayjs('2019-01-25').unix() // 1548381600
+     * ```
+     * This value is floored to the nearest second, and does not include a milliseconds component.
+     *
+     * Docs: https://day.js.org/docs/en/display/unix-timestamp
+     */
     unix(): number
-
+    /**
+     * Get the number of days in the current month.
+     * ```
+     * dayjs('2019-01-25').daysInMonth() // 31
+     * ```
+     * Docs: https://day.js.org/docs/en/display/days-in-month
+     */
     daysInMonth(): number
-
+    /**
+     * To get a copy of the native `Date` object parsed from the Day.js object use `dayjs#toDate`.
+     * ```
+     * dayjs('2019-01-25').toDate()// => Date
+     * ```
+     */
     toDate(): Date
-
+    /**
+     * To serialize as an ISO 8601 string.
+     * ```
+     * dayjs('2019-01-25').toJSON() // '2019-01-25T02:00:00.000Z'
+     * ```
+     * Docs: https://day.js.org/docs/en/display/as-json
+     */
     toJSON(): string
-
+    /**
+     * To format as an ISO 8601 string.
+     * ```
+     * dayjs('2019-01-25').toISOString() // '2019-01-25T02:00:00.000Z'
+     * ```
+     * Docs: https://day.js.org/docs/en/display/as-iso-string
+     */
     toISOString(): string
-
+    /**
+     * Returns a string representation of the date.
+     * ```
+     * dayjs('2019-01-25').toString() // 'Fri, 25 Jan 2019 02:00:00 GMT'
+     * ```
+     * Docs: https://day.js.org/docs/en/display/as-string
+     */
     toString(): string
-
+    /**
+     * Get the UTC offset in minutes.
+     * ```
+     * dayjs().utcOffset()
+     * ```
+     * Docs: https://day.js.org/docs/en/manipulate/utc-offset
+     */
     utcOffset(): number
-
+    /**
+     * This indicates whether the Day.js object is before the other supplied date-time.
+     * ```
+     * dayjs().isBefore(dayjs('2011-01-01')) // default milliseconds
+     * ```
+     * If you want to limit the granularity to a unit other than milliseconds, pass it as the second parameter.
+     * ```
+     * dayjs().isBefore('2011-01-01', 'year')// => boolean
+     * ```
+     * Units are case insensitive, and support plural and short forms.
+     *
+     * Docs: https://day.js.org/docs/en/query/is-before
+     */
     isBefore(date: ConfigType, unit?: OpUnitType): boolean
-
+    /**
+     * This indicates whether the Day.js object is the same as the other supplied date-time.
+     * ```
+     * dayjs().isSame(dayjs('2011-01-01')) // default milliseconds
+     * ```
+     * If you want to limit the granularity to a unit other than milliseconds, pass it as the second parameter.
+     * ```
+     * dayjs().isSame('2011-01-01', 'year')// => boolean
+     * ```
+     * Docs: https://day.js.org/docs/en/query/is-same
+     */
     isSame(date: ConfigType, unit?: OpUnitType): boolean
-
+    /**
+     * This indicates whether the Day.js object is after the other supplied date-time.
+     * ```
+     * dayjs().isAfter(dayjs('2011-01-01')) // default milliseconds
+     * ```
+     * If you want to limit the granularity to a unit other than milliseconds, pass it as the second parameter.
+     * ```
+     * dayjs().isAfter('2011-01-01', 'year')// => boolean
+     * ```
+     * Units are case insensitive, and support plural and short forms.
+     *
+     * Docs: https://day.js.org/docs/en/query/is-after
+     */
     isAfter(date: ConfigType, unit?: OpUnitType): boolean
 
     locale(): string