v2.1.5

• Abandon size and change to estimate-size.

• Make estimate-size and keeps both optional.

v2.1.4

• Using hasOwnProperty to check dataKey #197

• Fixed scrollIntoView strange bug #198

• Fixed horizontal scrollToBottom error

v2.1.3

• Fixed scroll event emit misss

• Fixed iOS scroll to top spring-back

v2.1.2

• Support resized event

• Support prop index of item

• Support getSize and getSizes methods

• Support item-class-add function

• Both totop and tobottom event no param

• Other improves

v2.1.1

Fixed extra-props error

v2.1.0

Improving get data value performance

v2.0.9

• Fixed start and offset prop data change reactive #188
• Throw a warning when data-key error

v2.0.8

Fixed functional component warning #185

v2.0.7

Fixed keep-alive component loss offset #161

v2.0.6

Fix someone browser get decimal offset and never trigger tobottom event #184