Video: Thaum twg koj yuav siv async ncua?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Feem ntau koj xav siv async qhov ua tau, ces ncua ces tsis muaj attribute. Ntawm no yog tej kev cai dav dav rau ua raws li: Yog tias tsab ntawv yog modular thiab ua tsis cia siab rau tej scripts ces siv async . Yog tias tsab ntawv tso siab rau los yog tso siab rau lwm tus tsab ntawv ces siv defer.
Hauv qhov no, qhov twg zoo dua async lossis defer?
DEFER ib txwm ua rau cov ntawv ua tiav tshwm sim tib lub sijhawm los yog tom qab ntawd ASYNC . Yog li ntawd, nws yog zoo dua siv DEFER yog li ntawd lawv qhov kev tua tshwm sim sab nraum lub sijhawm ua haujlwm tseem ceeb. DEFER scripts yeej tsis thaiv synchronous scripts, thaum ASYNC scripts yuav nyob ntawm seb lawv download tau sai npaum li cas.
Tsis tas li ntawd, dab tsi yog qhov kev siv ntawm defer attribute? Cov ncua attribute yog boolean tus cwj pwm . Thaum tam sim no, nws qhia meej tias tsab ntawv raug tua thaum nplooj ntawv tau ua tiav parsing. Lus Cim: Cov ncua attribute tsuas yog rau cov ntawv sau sab nraud (tsuas yog yuav tsum yog siv yog src tus cwj pwm yog tam sim no).
Tom qab ntawd, ib tug kuj yuav nug, async defer ua dab tsi?
Nrog async ( asynchronous ), browser yuav txuas ntxiv mus thauj cov nplooj ntawv HTML thiab muab nws thaum lub browser thauj khoom thiab ua tiav cov ntawv nyob rau tib lub sijhawm. Nrog ncua , browser yuav khiav koj tsab ntawv thaum nplooj ntawv tiav parsing. (tsis tsim nyog ua tiav rub tawm tag nrho cov duab cov ntaub ntawv.
Defer loading yog dab tsi?
Tseeb tiag ncua javascript txhais tau tias thauj khoom lossis parsing ntawm javascript tsuas yog pib tom qab nplooj ntawv cov ntsiab lus tau thauj khoom (Lub ntsiab lus nws yuav tsis cuam tshuam rau nplooj ntawv nrawm lossis txoj hauv kev tseem ceeb).
Pom zoo:
Thaum twg koj yuav siv daim ntawv qhia tawm?
#561 - Siv cov lus tshaj tawm tawm thaum siv cov iterator, cov lus xa rov qab xa rov qab cov ntsiab lus tom ntej hauv cov kab ke rov qab. Yog tias koj siv lub voj voog nyob rau hauv lub iterator thaiv, koj tuaj yeem siv cov lus qhia tawm los ua kom tawg tawm ntawm lub voj, qhia tias tsis muaj cov ntsiab lus rov qab los
Thaum twg koj yuav siv qhov dej tsaws tsag?
Thaum siv cov qauv dej tsaws tsag Cov qauv no tsuas yog siv thaum cov kev xav tau zoo heev paub, meej thiab ruaj khov. Cov khoom txhais tau ruaj khov. Technology yog to taub. Tsis muaj kev xav tsis meej. Cov peev txheej txaus nrog cov kws tshaj lij uas xav tau yog muaj pub dawb. Qhov project luv luv
Vim li cas koj yuav tsum tshuaj xyuas cov cav tsis tu ncua thiab koj yuav tsum tswj txoj haujlwm no li cas?
Los ntawm kev saib xyuas kev ruaj ntseg, lub hom phiaj ntawm lub cav yog ua raws li tus chij liab thaum muaj ib yam dab tsi phem tshwm sim. Kev tshuaj xyuas cov cav tsis tu ncua tuaj yeem pab txheeb xyuas qhov kev tawm tsam tsis zoo ntawm koj lub cev. Muab qhov loj ntawm cov ntaub ntawv cav tsim los ntawm cov tshuab, nws yog qhov ua tsis tau zoo los tshuaj xyuas tag nrho cov cav no manually txhua hnub
Thaum twg koj yuav tsum siv VUEX?
Nws tuaj yeem siv tau rau hauv cov xwm txheej uas koj xav tau kom dhau cov ntaub ntawv los ntawm niam txiv tivthaiv rau ib lossis ntau yam menyuam yaus uas yuav tsis yog cov xeeb leej xeeb ntxwv ntawm niam txiv
Thaum twg yuav tsum On_success On_failure ib txwm phau ntawv lossis ncua?
On_success - ua haujlwm tsuas yog thaum txhua txoj haujlwm los ntawm theem ua ntej ua tiav. Qhov no yog lub neej ntawd. on_failure - ua haujlwm tsuas yog thaum tsawg kawg ib txoj haujlwm los ntawm theem ua ntej ua tsis tiav. ib txwm - ua haujlwm tsis hais txog cov xwm txheej ntawm txoj haujlwm los ntawm theem ua ntej