[HTML5.Architecture(Early.Release)].Wesley.Hales.文字版

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1、O’ReillyMedia,Inc.3/9/20122I♥TheMobileWebIt’sestimatedthattherewillbeonebillionHTML5-capablephonessoldin2013.ThegroundswellofsupportforHTML5overnativeishereandtoday’sdevelopersareflippingtheirprioritiestonowputmobiledevelopmentfirst—whichiswhythischaptercomesf

2、irst[note:itmayactuallybesecondtechnicallyspeaking].Whetheryou’reanHTML5,W3CStandardslovin’,OpenWebexpertorjustcomingfreshoffHTML1,thischapterwillequipyouwiththelatestcode,trends,andmarketresearchtoguideyouonmakingtherightdecisionforyournextmobilewebproject.Th

3、eMobileWebreferstobrowser-basedapplicationscreatedformobiledevices,suchassmartphonesortablets,whichare(atsomepoint)connectedwirelessly.Since2008,thewebhasshiftedtowardsfocusingonmobilebrowsers,whicharedeliveringanoverallbetterqualityoflifefortoday’swebdevelope

4、rsandusers.However,thisbetterqualityoflifeissometimesshortlivedafteryougoaroundtestingyournewmobilewebapponthemyriadofdevicesandbrowsers.Thereisahugequestionof“WhatissupportedandwhichHTML5featuresshouldIbuildmyappwith?”.Thischaptertriestoanswerthetoughquestion

5、sweareallfacedwithasmobilewebdevelopers.Thosequestionswhichwillhaveaprofoundimpactonyournewinitiativeforyearstocome.Sowhatareyouwaitingfor?Levelup!MobileFirstFirst,let’sgetourprioritiesstraight.Prioritizingmobiledesignanddevelopmentoverthedesktopwasoncelaughab

6、le.Injustafewyears,mobilefirsthastakenover,givingwebdevelopersabreathoffreshairintermsofHTML5basedAPIstowardshardwareaccessonmobiledevices.Apartfromtheobvious,therearemultiplereasonsforthinkingmobilefirst:•Developingsitesforconstraineddevicesandresolutionswill

7、forceyoutocreatemorefluid/flexiblecontent.1O’ReillyMedia,Inc.3/9/2012•Devicefeatures,suchasaccelerometerandgeolocationhardware,presentnewbusinessopportunitieswithtechnologieslikeAugmentedReality.•Overall,mobilefirstrequiresyoutothinkinacodequalitymindset.Today

8、,it’srequiredfordeveloperstoworryaboutthingslikebatterylifewhendoinghardwareacceleratedanimationswithCSS;Thisqualityofdevelopmentnotonlybringsbetterperformingapps,butitalsoencourag