v4.3.0

• ADD dialog to change current semester
• ADD link for file preview in detail page (workaround for a Chrome bug)
• FIX sorting function of cards, showing undue homework in deadline order

v4.2.1 (revision 3)

The version will be v4.2.1.3 in all online stores.

• ADD preview window to the detail page of files
• REMOVE permission of learn2018.tsinghua.edu.cn
• Rewrite welcome page using modern CSS

v4.2.0

• ADD switch to preact and adjust bundle configuration to reduce code size (but also increase the minimal browser version)
• ADD more information in error recovery page
• FIX crash after dropping a course (again)

v4.1.7

• FIX wrong UI logic when login failed
• ADD more specific error recovery message

v4.1.6

• FIX inability to login after login failed
• FIX crash triggered by wrong badge counting

v4.1.5

• FIX scrolling problem of sidebar

v4.1.4

• FIX crash after dropping courses
• FIX wrong order of undue homework in card list
• FIX ignored homework counting in badges

v4.1.3

• FIX wrong logic in version migration which clears data at each start

v4.1.2

• FIX error when loading content from disabled modules of courses
• ADD general handler to clear all data when fatal error occurs

v4.1.1

FIX wrong encoding of notifications (caused by thu-learn-lib)