Video: Dab tsi yog qhov xwm txheej tshwm sim ( )?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Txoj cai no siv tau thaum React hluavtaws xwm txheej yog siv nyob rau hauv lub asynchronous callback muaj nuj nqi tsis hu xwm txheej . nyob twj ywm (). React siv cov khoom SyntheticEvent los qhwv haiv neeg xwm txheej . Rau kev ua tau zoo yog vim li cas, hluavtaws xwm txheej tau sib sau ua ke thiab rov siv dua thoob plaws ntau haiv neeg xwm txheej.
Kuj nug, SyntheticEvent yog dab tsi?
Raws li official docs, SyntheticEvent yog tus ntoo khaub lig-browser wrapper ib ncig ntawm qhov browser qhov xwm txheej ib txwm muaj. Nws muaj qhov sib txuas zoo ib yam li qhov browser qhov xwm txheej ib txwm muaj, suav nrog stopPropagation() thiab tiv thaivDefault(), tshwj tsis yog cov xwm txheej ua haujlwm zoo ib yam thoob plaws txhua qhov browser.
Kuj Paub, qhov xwm txheej tiv thaivDefault () yog dab tsi? Teb siv hluavtaws xwm txheej tuav xwm txheej los ntawm khawm, tawm tswv yim thiab daim ntawv cov ntsiab lus. Nws qhia txog yuav ua li cas ntxiv ib yam khoom rau ib daim ntawv teev npe los ntawm kev siv ib daim ntawv nrog cov tswv yim thiab cov khoom khawm. Hauv qhov no, a tiv thaivDefault yog hu ua xwm txheej thaum xa daim foos los tiv thaiv qhov browser reload/refresh.
Ib yam li ntawd, cov xwm txheej React txawv ntawm cov xwm txheej DOM li niaj zaus li cas?
Siv React Event Handlers Qhov tseem ceeb sib txawv nruab nrab React qhov xwm txheej handlers thiab haiv neeg DOM kev tshwm sim handlers yog cov npe yog camelcase es tsis txhob me me, koj dhau hauv kev ua haujlwm es tsis txhob siv cov hlua, thiab koj yuav tsum tau hu xovtooj rau stopPropagation es tsis txhob rov qab tsis tseeb.
Kuv yuav ua li cas kom tsis txhob tshwm sim bubbling nyob rau hauv react?
Stop Event Bubbling : Yog koj xav tau nres tus kev tshwm sim bubbling , qhov no tuaj yeem ua tiav los ntawm kev siv cov xwm txheej . stopPropagation () txoj kev. Yog koj xav tau nres tus xwm txheej ntws los ntawm xwm txheej lub hom phiaj rau cov ntsiab lus saum toj kawg nkaus hauv DOM, xwm txheej . stopPropagation () txoj kev nres lub xwm txheej taug kev mus rau hauv qab mus rau saum.
Pom zoo:
Dab tsi yog qhov txawv ntawm qhov xwm txheej thiab qhov xwm txheej hauv ITIL?
Qhov sib txawv ntawm cov xwm txheej thiab xwm txheej hauv ITIL Ib qho xwm txheej yog kev cuam tshuam uas tsis tau npaj tseg lossis txo qis hauv kev ua haujlwm ntawm IT kev pabcuam. Ib qho kev tshwm sim yog qhov hloov me ntsis hauv lub xeev ntawm cov kab ke lossis kev pabcuam hauv IT infrastructure
Dab tsi yog qhov txawv ntawm kev tswj qhov xwm txheej thiab kev tswj xyuas qhov xwm txheej loj?
Yog li MI yog hais txog kev lees paub tias qhov xwm txheej ib txwm muaj thiab Kev Tswj Xyuas Teeb Meem yuav tsis txiav nws. Ib qho xwm txheej loj yog kev tshaj tawm ntawm lub xeev xwm txheej ceev. Ib qho xwm txheej loj yog nruab nrab ntawm qhov xwm txheej ib txwm muaj thiab kev puas tsuaj (qhov twg IT Service Continuity Management txheej txheem pib)
Dab tsi yog qhov xwm txheej hauv ITIL txheej txheem?
Dab tsi yog qhov xwm txheej? ITIL txhais qhov xwm txheej raws li qhov kev cuam tshuam tsis tau npaj tseg rau lossis txo qhov kev pabcuam IT zoo. Cov ntawv cog lus qib kev pabcuam (SLA) txhais cov kev pom zoo-raws li kev pabcuam ntawm tus neeg muab kev pabcuam thiab tus neeg siv khoom. Cov xwm txheej txawv ntawm ob qho teeb meem thiab kev thov
Dab tsi yog qhov tshwm sim tshwm sim?
Ib qho 'kev mob tshwm sim' yog txhua yam uas cuam tshuam rau qee yam sab nraud ntawm qhov kev ua haujlwm raug tua. Cov haujlwm uas ua haujlwm yam tsis muaj kev phiv yog hu ua 'ntshiab' ua haujlwm: lawv siv cov lus sib cav, thiab lawv rov qab muaj nuj nqis. Tsis muaj dab tsi ntxiv tshwm sim thaum ua haujlwm
Dab tsi yog qhov haujlwm ntawm OSI txheej txheej txheej txheej txheej txheem router ua haujlwm li cas?
Hauv Cov Qauv Qhib Kev Sib Txuas Sib Txuas (OSI) kev sib txuas lus, txheej txheej txheej txheem nyob ntawm Txheej 5 thiab tswj kev teeb tsa thiab rhuav tshem ntawm kev sib txuas ntawm ob qhov kev sib txuas lus kawg. Kev sib txuas lus ntawm ob qhov kawg yog hu ua kev sib txuas