Band of Brothers front-end example display video tutorial

• Chapter1 Introduction to the knowledge points used
• 1-1 Introduction to canvas tag
• 1-2 CSS Development History and CSS3 Performance Preview
• 1-3 CSS3’s new selector 1-selector
• 1-4 CSS3’s new selector 3 instance-selector
• Chapter2 Example explanation
• 2-1 canvas instance 1-clock
• 2-2 canvas example 2-solar system 1
• 2-3 canvas example 2-solar system 2
• 2-4 canvas example 3-online drawing tool-function introduction + page layout
• 2-5 canvas example 3-online drawing tool-status setting
• 2-6 canvas example 3-online drawing tool-line drawing and attribute settings
• 2-7 canvas example 3-online drawing tool-shape tool
• 2-8 canvas example 3-online drawing tool-button tool
• 2-9 canvas example 3-online drawing tool-image function, text and magnifying glass