As ISO 8601 String
Returns duration in string as specified by ISO 8601 standard.
dayjs.duration(1, 'd').toISOString() // "P1D"
Format PnYnMnDTnHnMnS description:
| Unit | Meaning |
|---|---|
| P | P stands for period. Placed at the start of the duration representation. |
| Y | Year |
| M | Month |
| D | Day |
| T | Designator that precedes the time components. |
| H | Hour |
| M | Minute |
| S | Second |