CSS style classification

CSS style classification
1, inline (directly in the label write attribute property name is style)
For example: <div style= "width:100px; height:100px; " ></div>
2, embedded (directly embedded in the head tag, in the form of a label, the label is named Style)
Selector: Used to select the label (which label to add the style to)
1. Tag Selector (select with tag name)
2. ID selector key Symbol # ID is unique
3, class selector key symbol.
4. Composite Selector
Descendant selector key symbol spaces
Parallel selector key symbol,
Filter selector key symbol.
3. External references

CSS style classification