Summary of CSS layout basics_html/css_WEB-ITnose
One-column layout
Two-column layout
If float is not added, side-by-side two-column layout cannot be achieved.
Three-column layout
Three-column layout: left and right fixed, middle adaptive:
- Standard document flow
- Floating
- Absolute positioning
{ display: none; /* 不占据空间，无法点击 */ }{ visibility: hidden; /* 占据空间，无法点击 */ }{ position: absolute; clip:rect(1px 1px 1px 1px); /* 不占据空间，无法点击 */ }{ position: absolute; top: -999em; /* 不占据空间，无法点击 */ }{ position: relative; top: -999em; /* 占据空间，无法点击 */ }{ position: absolute; visibility: hidden; /* 不占据空间，无法点击 */ }{ height: 0; overflow: hidden; /* 不占据空间，无法点击 */ }{ opacity: 0; filter:Alpha(opacity=0); /* 占据空间，可以点击 */ }{ position: absolute; opacity: 0; filter:Alpha(opacity=0); /* 不占据空间，可以点击 */ } Add overflow: hidden
at the parent level. Advantages: There are no structural and semantic problems, and the amount of code is very small.
Advantages: There are no structural and semantic problems, and the amount of code is very small
Disadvantages: It makes elements adjacent to the parent element The layout will be affected and it is impossible to float all the way to the body. It is not recommended to use
Advantages: The structure semantics is completely correct and the amount of code is very small
Disadvantages: Box model The attributes have been changed, and the resulting series of problems are not worth the loss. It is not recommended to use
Advantages: It should be noted that: after is a pseudo-element, not a pseudo-class (some CSS It is called "pseudo-object" in the manual), and many articles such as Clear Float are called pseudo-classes. However, CSS should be more rigorous. This is an attitude.
Since IE6-7 does not support :after, use zoom:1 to trigger hasLayout.
Disadvantages: Compatibility is not very good.
Clear floats
Advantages: Simple and clearDisadvantages: Meaningless empty tags, not conducive to semantics
DIV CSS specification named collection
DIV CSS naming reference table| wrapper | Page peripheral control overall layout width | master.css, style.css | main | |
| container or #content | container, used for the outermost | module.css | Module | |
| layout | Layout | base.css | Basic common | |
| head,#header | Header part | layout .css | Layout, layout | |
| foot, #footer | Footer part | themes. css | theme | |
| nav | main navigation | columns.css | Column | |
| subnav | Secondary navigation | font.css | Text, font | |
| menu | menu | forms.css | form | |
| submenu | Submenu | mend.css | Patch | |
| sideBar | Sidebar | print.css | ||
| sidebar_a,#sidebar_b | Leftbar or Right column | |||
| main | Page body | |||
| tag | tag | |||
| msg#message | Prompt message | |||
| tips | Tips | |||
| vote | Vote | |||
| friendlink | Friendlink | |||
| title | title | |||
| summary | Summary | |||
| loginbar | Log in Bar | |||
| searchInput | Search input box | |||
| hot | Hot Hotspot | |||
| search | Search | |||
| search_output | Search output is similar to search results | |||
| searchBar | Search bar | |||
| search_results | Search results | |||
| copyright | Copyright information | |||
| branding | Trademark | |||
| logo | Website LOGO | |||
| siteinfo | Website information | |||
| siteinfoLegal | Legal Notice | |||
| siteinfoCredits | Reputation | |||
| joinus | Join us | |||
| partner | Partner | |||
| service | Service | |||
| regsiter | Register | |||
| arr/arrow | arrow | |||
| guild | Guidelines | |||
| sitemap | Sitemap | |||
| list | list | |||
| homepage | Homepage | |||
| subpage | Secondary page sub-page | |||
| tool,#toolbar | Toolbar | |||
| drop | Drop-down | |||
| dorpmenu | 下拉菜单 | |||
| status | 状态 | |||
| scroll | 滚动 | |||
| .tab | 标签页 | |||
| .left.right.center | 居左、中、右 | |||
| .news | 新闻 | |||
| .download | 下载 | |||
| .banner | 广告条(顶部广告条) |
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