Height

• percentage:
  • if the containing block element is specified a height, the percentage is based on the containing element's height
  • if the containing block element is not specified a height, equal to auto,meaning the size will be based on the height of the content
  • if the content requires more height than if could has from the containing element, the effect will be influenced by overflow property

HTML

• w3school
• 教程里关键的部分是提取实战中各个元素的常见用处
• 可以拿一些大厂的网页来做分析，对应标签和属性进行学习