Due to the continuous development of Weex, some version fragmentation problems occur inevitably . For example, certain new features are not fully supported in the historical version. In this case, we need to degrade Weex to HTML and render through web.
Currently, there are many conditions and rules for the degradation which triggered by Weex definition, including operating system version, app version, SDK version, etc.
Weex 2.0 downgrade change to module，please refer to downgrade