1.1 the first mini program+ 2.1 size units and page styles + 2.2 flex layout+ 2.3 background image and font icon + 2.4 import external resources+ 3.1 the basics of component+ 3.2 view component+ 3.3 scroll-view component+ 3.4 swiper component+ 3.5 icon component + 3.6 text component + 3.7 rich-text component+ 3.8 progress component+ 3.9 label component+ 3.10 textarea component+ 3.11 input component+ 3.12 checkbox component+ 3.13 radio component+ 3.14 slider component+ 3.15 picker selector+