Chuong4 Phan 2 CSS

8/18/2019 Chuong4 Phan 2 CSS

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Trình bày: Nguyễn Phú Trường


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NỘI DUNG

Bộ môn Mạng máy tính & Truyền thông 23/9/2013

Giới thiệu CSS

Các loại CSS

Cách dùng CSS

Các CSS cơ bản

Các CSS nâng cao


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GROUPING SELECTORS

In style sheets there are often elements with the same

style.

h1

{

color:green;

}

h2

{

color:green;}

p

{

color:green;

}Bộ môn Mạng máy tính & Truyền thông 33/9/2013


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GROUPING SELECTORS

To minimize the code, you can group selectors.

Separate each selector with a comma.

In the example below we have grouped the selectors

from the code above: h1,h2,p

{

color:green;

}



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NESTING SELECTORS

It is possible to apply a

style for a selector within

a selector. In the example below,

one style is specified for

all p elements, and a

separate style is specifiedfor p elements nested

within the "important"

class:

Example

p

{

color:blue;

text-align:center;}

.important

{

background-color:blue;

}.important p

{

color:white;

}



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CSS DIMENSION

The CSS dimension properties allow you to control the

height and width of an element. Set the height of elements

This example demonstrates how to set the height of different elements.

Set the height of an image using percent

This example demonstrates how to set the height of an element using a percent value.

Set the width of an element using a pixel value

This example demonstrates how to set the width of an element using a pixel value.

Set the maximum height of an element

This example demonstrates how to set the maximum height of an element.

Set the maximum width of an element using percent

This example demonstrates how to set the maximum width of an element using a percent

value.

Set the minimum height of an element

This example demonstrates how to set the minimum height of an element.

Set the minimum width of an element using a pixel value

This example demonstrates how to set the minimum width of an element using a pixel value.


http://www.w3schools.com/css/tryit.asp?filename=trycss_dim_heighthttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_height_percenthttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_widthhttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_max-heighthttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_max-width_percenthttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_min-heighthttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_min-widthhttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_min-widthhttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_min-heighthttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_max-width_percenthttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_max-heighthttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_widthhttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_height_percenthttp://www.w3schools.com/css/tryit.asp?filename=trycss_dim_height


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ALL CSS DIMENSION PROPERTIES

Property Description Values CSS

height Sets the height of an element auto

length

%

inherit

1

max-height Sets the maximum height of an element none

length

%inherit

2

max-width Sets the maximum width of an element none

length

%

inherit

2

min-height Sets the minimum height of an element length

%

inherit

2

min-width Sets the minimum width of an element length

%

inherit

2

width Sets the width of an element auto

length

%

inherit

1


http://www.w3schools.com/css/pr_dim_height.asphttp://www.w3schools.com/css/pr_dim_max-height.asphttp://www.w3schools.com/css/pr_dim_max-width.asphttp://www.w3schools.com/css/pr_dim_min-height.asphttp://www.w3schools.com/css/pr_dim_min-width.asphttp://www.w3schools.com/css/pr_dim_width.asphttp://www.w3schools.com/css/pr_dim_width.asphttp://www.w3schools.com/css/pr_dim_min-width.asphttp://www.w3schools.com/css/pr_dim_min-width.asphttp://www.w3schools.com/css/pr_dim_min-width.asphttp://www.w3schools.com/css/pr_dim_min-height.asphttp://www.w3schools.com/css/pr_dim_min-height.asphttp://www.w3schools.com/css/pr_dim_min-height.asphttp://www.w3schools.com/css/pr_dim_max-width.asphttp://www.w3schools.com/css/pr_dim_max-width.asphttp://www.w3schools.com/css/pr_dim_max-width.asphttp://www.w3schools.com/css/pr_dim_max-height.asphttp://www.w3schools.com/css/pr_dim_max-height.asphttp://www.w3schools.com/css/pr_dim_max-height.asphttp://www.w3schools.com/css/pr_dim_height.asp


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CSS DISPLAY AND VISIBILITY

The CSS classification properties specifies if/how an

element is to be displayed, and to control the visibility of

an element.

Hiding an Element - display:none or visibility:hidden Hiding an element can be done by setting the display

property to "none" or the visibility property to "hidden".

However, notice that these two methods produce different

results:

visibility:hidden hides an element, but it will still take up thesame space as before. The element will be hidden, but still

affect the layout.



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CSS DISPLAY AND VISIBILITY

Example

h1.hidden {visibility:hidden}

display:none hides an element, and it will not take up any

space. The element will be hidden, and the page will bedisplayed as the element is not there:

Example

h1.hidden {display:none}



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CSS DISPLAY - BLOCK AND INLINE ELEMENTS

A block element is an element that takes up the full width

available, and has a line break before and after it.

Examples of block elements:

An inline element only takes up as much width as

necessary, and does not force line breaks. Examples of inline elements:



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CHANGING HOW AN ELEMENT IS DISPLAYED

Changing an inline element to a block element, or vice

versa, can be useful for making the page look a specific

way, and still follow web standards.

The following example displays list items as inlineelements:

Example

li {display:inline}

The following example displays span elements as blockelements:

Example

span {display:block}


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