# wx.setBackgroundFetchToken(object object)
Start from base library version 2.8.0. Please remaining backward compatible.
with Promise style call: Supported
Mini Program plugin: Not supported
Set the custom login state, in the periodic pull data, to facilitate third-party server verification request legitimacy
# parameter
# object object
| attribute | type | Default values | Required | Introductions |
|---|---|---|---|---|
| token | String | yes | Custom login states | |
| success | function | no | Interface calls the successful callback function | |
| fail | function | no | Interface calls failed callback functions | |
| complete | function | no | Callback function at the end of an interface call (both successful and unsuccessful calls are executed) |