http://www.tutorialspoint.com/css/css_layouts.htm
css样式大全 时间:2021-01-06 阅读:()
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comCSS-LAYOUTSCSS-LAYOUTSHopeyouareverycomfortablewithHTMLtablesandyouareefficientindesigningpagelayoutsusingHTMLTables.
ButyouknowCSSalsoprovidesplentyofcontrolsforpositioningelementsinadocument.
SinceCSSisthewaveofthefuture,whynotlearnanduseCSSinsteadoftablesforpagelayoutpurposesThefollowinglistcollectsafewprosandconsofboththetechnologiesMostbrowserssupporttables,whileCSSsupportisbeingslowlyadopted.
Tablesaremoreforgivingwhenthebrowserwindowsizechanges-morphingtheircontentandwrappingtoaccommodatethechangesaccordingly.
CSSpositioningtendstobeexactandfairlyinflexible.
TablesaremucheasiertolearnandmanipulatethanCSSrules.
ButeachoftheseargumentscanbereversedCSSispivotaltothefutureofWebdocumentsandwillbesupportedbymostbrowsers.
CSSismoreexactthantables,allowingyourdocumenttobeviewedasyouintended,regardlessofthebrowserwindow.
Keepingtrackofnestedtablescanbearealpain.
CSSrulestendtobewellorganized,easilyread,andeasilychanged.
Finally,wewouldsuggestyoutousewhichevertechnologymakessensetoyouandusewhatyouknoworwhatpresentsyourdocumentsinthebestway.
CSSalsoprovidestable-layoutpropertytomakeyourtablesloadmuchfaster.
FollowingisanexampleCSStablelayoutcell1CSStablelayoutcell2CSStablelayoutcell3Youwillnoticethebenefitsmoreonlargetables.
WithtraditionalHTML,thebrowserhadtocalculateeverycellbeforefinallyrenderingthetable.
Whenyousetthetable-layoutalgorithmtofixed,however,itonlyneedstolookatthefirstrowbeforerenderingthewholetable.
Itmeansyourtablewillneedtohavefixedcolumnwidthsandrowheights.
SampleColumnLayoutHerearethestepstocreateasimpleColumnLayoutusingCSSSetthemarginandpaddingofthecompletedocumentasfollowsNow,wewilldefineacolumnwithyellowcolorandlater,wewillattachthisruletoa:Uptothispoint,wewillhaveadocumentwithyellowbody,soletusnowdefineanotherdivisioninsidelevel0Now,wewillnestonemoredivisioninsidelevel1,andwewillchangejustbackgroundcolorFinally,wewillusethesametechnique,nestalevel3divisioninsidelevel2togetthevisuallayoutfortherightcolumnCompletethesourcecodeasfollowsbody{margin:9px9px09px;padding:0;background:#FFF;}#level0{background:#FC0;}#level1{margin-left:143px;padding-left:9px;background:#FFF;}#level2{background:#FFF3AC;}#level3{margin-right:143px;padding-right:9px;background:#FFF;}#main{background:#CCC;}FinalContentgoes
comCSS-LAYOUTSCSS-LAYOUTSHopeyouareverycomfortablewithHTMLtablesandyouareefficientindesigningpagelayoutsusingHTMLTables.
ButyouknowCSSalsoprovidesplentyofcontrolsforpositioningelementsinadocument.
SinceCSSisthewaveofthefuture,whynotlearnanduseCSSinsteadoftablesforpagelayoutpurposesThefollowinglistcollectsafewprosandconsofboththetechnologiesMostbrowserssupporttables,whileCSSsupportisbeingslowlyadopted.
Tablesaremoreforgivingwhenthebrowserwindowsizechanges-morphingtheircontentandwrappingtoaccommodatethechangesaccordingly.
CSSpositioningtendstobeexactandfairlyinflexible.
TablesaremucheasiertolearnandmanipulatethanCSSrules.
ButeachoftheseargumentscanbereversedCSSispivotaltothefutureofWebdocumentsandwillbesupportedbymostbrowsers.
CSSismoreexactthantables,allowingyourdocumenttobeviewedasyouintended,regardlessofthebrowserwindow.
Keepingtrackofnestedtablescanbearealpain.
CSSrulestendtobewellorganized,easilyread,andeasilychanged.
Finally,wewouldsuggestyoutousewhichevertechnologymakessensetoyouandusewhatyouknoworwhatpresentsyourdocumentsinthebestway.
CSSalsoprovidestable-layoutpropertytomakeyourtablesloadmuchfaster.
FollowingisanexampleCSStablelayoutcell1CSStablelayoutcell2CSStablelayoutcell3Youwillnoticethebenefitsmoreonlargetables.
WithtraditionalHTML,thebrowserhadtocalculateeverycellbeforefinallyrenderingthetable.
Whenyousetthetable-layoutalgorithmtofixed,however,itonlyneedstolookatthefirstrowbeforerenderingthewholetable.
Itmeansyourtablewillneedtohavefixedcolumnwidthsandrowheights.
SampleColumnLayoutHerearethestepstocreateasimpleColumnLayoutusingCSSSetthemarginandpaddingofthecompletedocumentasfollowsNow,wewilldefineacolumnwithyellowcolorandlater,wewillattachthisruletoa:Uptothispoint,wewillhaveadocumentwithyellowbody,soletusnowdefineanotherdivisioninsidelevel0Now,wewillnestonemoredivisioninsidelevel1,andwewillchangejustbackgroundcolorFinally,wewillusethesametechnique,nestalevel3divisioninsidelevel2togetthevisuallayoutfortherightcolumnCompletethesourcecodeasfollowsbody{margin:9px9px09px;padding:0;background:#FFF;}#level0{background:#FC0;}#level1{margin-left:143px;padding-left:9px;background:#FFF;}#level2{background:#FFF3AC;}#level3{margin-right:143px;padding-right:9px;background:#FFF;}#main{background:#CCC;}FinalContentgoes
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