[Original] Reading Notes from 'DIV CSS Business Cases and Web Layout Development' (2)_html/css_WEB-ITnose

1. Basic CSS syntax: including 3 aspects, selector, attribute, and attribute value.

Selector { attribute : attribute value; }

Note:

1) Attributes must be included in {}.

2) Separate attributes and attribute values ​​with:.

3) When there are multiple attributes, use ; to distinguish them.

4) When writing attributes, using spaces, line breaks, etc. between attributes does not affect the display of the attributes.

5) An attribute has multiple attribute values, and each attribute value is separated by a space.

2. CSS calling methods:

Includes 3 types, interline calling (styles are defined directly in elements), internal calls (styles are defined in the page) and external calls (style files are written separately be called).

3. Interline call:

name>

4. Internal call:

Selector { attribute: attribute value; }

When called, depending on the content, The way of writing is different.

1)name>

2)

5. External call:

1) Use the link element to call

2) Use @improt to call

6. Priority of applying CSS:

Interline calls have the highest priority, internal calls come second, and external calls have the lowest priority.

1
2
3 color : red ;
6 background : green ;
7 }
8
9 span {
10 color : red ;
11 background : green ;
12 }
13 style > ;
14               head >
17                                                                                                                                          :Abbreviation of Document Type. Used to specify the XHTML or HTML version used by the page.

8.DOCTYPE selection:

There are three types of DTD (document type definition) in XHTML1.0, namely transitional, strict and framework ( Frameset).

1) Transitional DTD

2) Strict DTD

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