JQuery标签的使用-毕业论文外文翻译

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1、外文文献：DOMwithjQueryutilityfunctions—UsingthejQueryflags6.1UsingthejQueryflagsSomeoftheinformationjQuerymakesavailabletousaspageauthors,andevenpluginauthors,isavailablenotviamethodsorfunctionsbutaspropertiesdefinedon$.Manyoftheseflagsarefocusedonhelpingusdivinethecapabilitiesofthecurren

2、tbrowser,butothershelpuscontrolthebehaviorofjQueryatapage-globallevel.ThejQueryflagsintendedforpublicuseareasfollows:$.fx.off—Enablesordisabledeffects$.support—Detailssupportedfeatures$.browser—Exposesbrowserdetails(officiallydeprecated)Let’sstartbylookingathowjQueryletsusdisableanima

3、tions.6.1.1DisablinganimationsTheremaybetimeswhenwemightwanttoconditionallydisableanimationsinapagethatincludesvariousanimatedeffects.Wemightdosobecausewe’vedetectedthattheplatformordeviceisunlikelytodealwiththemwell,orperhapsforaccessibilityreasons.Inanycase,wedon’tneedtoresorttowrit

4、ingtwopages,onewithandonewithoutanimations.Whenwedetectwe’reinananimation-adverseenvironment,wecansimplysetthevalueof$.fx.offtotrue.Thiswillnotsuppressanyeffectswe’veusedonthepage;itwillsimplydisabletheanimationofthoseeffects.Forexample,thefadeeffectswillshowandhidetheelementsimmediat

5、ely,withouttheinterveninganimations.Similarly,callstotheanimate()methodwillsettheCSSpropertiestothespecifiedfinalvalueswithoutanimatingthem.UsingthejQueryflagsOnepossibleuse-caseforthisflagmightbeforcertainmobiledevicesorbrowsersthatdon’tcorrectlysupportanimations.Inthatcase,youmightw

6、anttoturnoffanimations19sothatthecorefunctionalitystillworks.The$.fx.offflagisaread/writeflag.Theremainingpredefinedflagsaremeanttoberead-only.Let’stakealookattheflagthatgivesusinformationontheenvironmentprovidedbytheuseragent(browser).6.1.2DetectinguseragentsupportThankfully,almostbl

7、issfully,thejQuerymethodsthatwe’veexaminedsofarshieldusfromhavingtodealwithbrowserdifferences,evenintraditionallyproblematicareaslikeeventhandling.Butwhenwe’retheoneswritingthesemethods(orotherextensions),wemayneedtoaccountforthedifferencesinthewaysbrowsersoperatesothattheusersofourex

8、tensi