# Features Overview

To facilitate debugging data pre-pulling, the tool provides the following debugging capabilities to developers

# Tools trigger data pre-pull

Currently, new settings are added to the local settings of the new version of the developer tools (1.02.1911202 and above).enable data prefetching. After this is set, the developer tool will request data from the user-configured prefetched data download during the Weixin Mini Program runtime, as shown in the following figure:

# Tool to clear pre-pull data

If you need to clear the tool cache of pre-pull data, you can do so by clickingto clear the data cacheorto completely clearon the toolbar.

# Common errors

# No TOKEN is set

Whentoken not set, maybe you should setBackgroundFetchToken firstAn error message that indicates that Weixin Mini Program does not actively set the TOKEN information needed to pre-pull data.Here you can view the following document weekly data debugging .

# -10007 no permission

When this scenario identifies a permission that is not pulled, you can view the following document for periodic data debugging to configure the ability to update data periodically.