website |

html

h1-h6 <h1></h1>
p "paragraphs"段落
a "link" <a href="">link text</a>
img <img src="">
list <ul> <li></li> <li></li> </ul>
div DIV元素:是用来为HTML文档内大块（block-level）的内容提供结构和背景的元素 <div class="nav"><div class="container">..</div></div> A div element groups other elements together into sections of the web page

<!DOCTYPE html> #which type of html

html selectot

h1 {
    color: yellow;
}

class selector

.className {
    color: blue;
}

combine

.className h1 {
    ...
}