CSS and HTML to strengthen the foundation

Regular expressions are used

Selector intermediate derived by spaces empty * /
- A b When A is on a label defined in the following A characteristic of this sub-label when the label b is modified to that particular high priority that
id id # tag selectors to define
Class selector uses. Class may be defined and used for use with a derived selector
Attribute selectors
- Elements with the specified attribute to be modified directly modified in html
- And attribute value selector
CSS background
- padding padding
- background-position: right top; the top right of the picture display position began to show
  - 110px 10ox: px represent values from above and from the left of the
  - %
- background-image:url('paper.gif')
text text
- text-align: justify each line is expanded to be equal to the width of the left and right margins are aligned (e.g., magazines and newspapers)
- Text-decoration decorator on a text was decorated scribe underline and strikethrough
- text-transform: uppercase text case Control
- Text-indent text-indent: 50px; Indent first line to the specified text

color	Set the text color
direction	Setting text orientation.
letter-spacing	Set character spacing
line-height	Set Row Height
text-align	Aligned text in the element
text-decoration	Adding modifications to the text
text-indent	Indent the first line of this elemental Chinese
text-shadow	Set the text shadow
text-transform	Letters control element
unicode-bidi	Sets or returns whether the text is rewritten
vertical-align	Element is set vertically aligned
white-space	Mode setting processing element blank
word-spacing	Set character spacing

- Link Properties strict accordance with the order
  - a: link {color: # 000000;} / * unvisited links * / a: visited {color: # 00FF00;} / * visited link * / a: hover {color: # FF00FF;} / * mouse movement to the link a * / a: active {color: # 0000FF;} / * * mouse clicks /
List styles
- list-style-image picture can be specified as a list of pre-bid style
- Position outside inside list-style-position mark point
- The type of list-style-type setting icon
Form table
- boder border border: 1px solid black; bis border effect
- border-collapse: collapse; folding table is provided that is a single border widened
- padding: 15px border control and content from inside
CSS BOX
- Margin (margins) - clear the area outside of the frame, it is transparent from the outside.

dashed: Define a dotted border

solid: definition of the most common solid border

double: two defined border. The same value two border width and border-width of

groove: 3D groove defined border. Effect depends on the color values of the border

ridge: the definition 3D ridge border. Effect depends on the color values of the border

inset: the definition of a 3D frame is embedded. Effect depends on the color values of the border

outset: Defines a 3D outset border. Effect depends on the color values of the border

A packet selector
- h1, h2, p {color: green;} tags using a plurality of style
- Nested selector
  - p {}: Specifies a style for all p elements.

.marked {}: for all class = "marked" element specifies a pattern.
.marked p {}: = p elements within the "marked" element specifies a style for all class.
p.marked {}: for all class = "marked" element specifies a pattern of p.

Display display and visibility visiable
- display: inline; z displayed in a row
- display: block; Branch display

CSS Position (positioning)

property specifies the position of the positioning element type. Only now positioned behind the position specified property is valid

Five values of the position property:

static static positioning elements will not be top, bottom, left, right influence.
relative positioning element is located opposite relative to its normal position.
Fixed position with respect to the element of the browser window is a fixed position. Even if the window is rolling it does not move: commonly used in display advertising
Position absolute absolute positioning of elements relative to the nearest positioned parent element, if the element is not already positioned parent element, then its position relative to the <html>:
sticky viscous positioning. It behaves like position: relative; when the page is scrolled beyond the target area, it behaves like position: fixed ;, it will be fixed at the target location.

Elements are positioned in front of performance across a certain threshold relative positioning, after a fixed positioning. https://www.runoob.com/try/try.php?filename=trycss_position_sticky

Attribute is used to display the contents of the overflow control block elements. Add a scroll bar elements within the corresponding section.

visible defaults. Content will not be pruned, there will be elements outside the box.
scroll content will be trimmed, but the browser will display the scroll bar to view the rest of the content.
If the content is auto trim, the browser will display the scroll bar to view the rest of the content.

CSS Float (floating)

Elements after the floating element will be around it. Element before the floating element will not be affected.

Floating clear - clear clear attribute used to specify the element can not appear on both sides of the floating element.
- clear:both;

Flex layout

to sum up:

flex container

display：flex / inline-flex
flex-direction: determine the direction of the spindle
justify-content: determined flex-items arrangement on the spindle
align-items: decision flex-items in a cross-axis arrangement
flex-wrap: Wrap decide whether
align-content: determines a plurality of rows flex-items in a cross-axis arrangement
flex-flow: a flex-direction, flex-wrap abbreviations

flex-items

flex: The following is an acronym for the three
flex-grow: flex-items decide how to extend in the direction of the spindle
flex-basis: width substantially determines flex-items in the main direction of the element, as a reference
flex-shrink: the decision flex-items How to shrink in the direction of the spindle
order: determines the order of the items
align-self: adjusting its subelements manner, eliminating the align-items caontainer

DeepM

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