Welcome to the world of Canvas!

Create canvas

Draw lines, polygons and jigsaw puzzles

Draw arcs and circles

The basic structure of the countdown program

Detailed drawing of countdown digital clock

Countdown time calculation

A basic function to implement animation

Use canvas to do a physics experiment

Gorgeous ball rolling effect

Performance optimization

Screen adaptive

Improved into a time management gadget

Modified to a dazzling clock effect

Summarize

Comprehensive introduction