If a promise is resolved with a null
or undefined
value, the fullfilled action will not include a payload property. This is because actions describe changes in state. Consider the following two actions:
// A{type: 'ACTION`,meta: ...}​// B{type: 'ACTION'payload: null,meta: ...}
Both actions describe the same change in state. This is why, when you resolve with null
or undefined
, the payload property is not included. It would be redundant to include it.