HTML5 Day 6 Notes

CSS Layout

Normal document flow: the order in which elements are arranged from top to bottom

Detached from document flow: elements are extracted from the normal arrangement order

Floating: Move the block-level elements to the far left and right of the parent element (arranged according to our own meaning)

float(float):left/right/none;

clear(clear):left /right/both;

float floats relative to the parent element

float is often used for mixed graphics and text

If there is a floating element, its parent element will collapse in height .

opacity represents transparency

PC web page layout

Fixed width and centered layout

Layout of banner header, navigation and footer

Basic components: header, navigation, banner, body, foot

Global style: (must be written every time you create a page)

*{
margin:0;
padding:0;
box-sizing:boder-box;content-box;
}
body{
font-size:12px;
font-family:Microsoft YaHei,"微软雅黑";
width:1000px;
margin:0 auto;
}
ul,ol,li{
list-style:none;
}
a{
text-decoration:none;
}
img{
border:none;
}

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Browser incompatibility occurs when margin-top is added to the child element , just give the parent element a padding: 0.1px to solve the problem

Font hidden-font-size:0px;

Rounded corner attribute: border-radius:20px 30px 40px 50px;

When making a circle, just give border-radius:50%;.

display:block; Convert inline elements to block-level elements

The default display of inline elements is display:inline; the default display of block-level elements is display:block;

The tags newly added by H5 can only write time

The tags newly added by H5 can only write copyright, address, etc.

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