Video: Koj puas tuaj yeem ncua JavaScript inline?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov ntawv sau nrog cov ncua attribute load nyob rau hauv qhov kev txiav txim lawv tau teev, tab sis tsis ua ntej cov ntaub ntawv nws tus kheej tau loaded. Raws li ncua tsis muaj teebmeem rau tsab ntawv tag tshwj tsis yog lawv kuj muaj tus cwj pwm src, thawj tsab ntawv uas tau raug tua yog koj inline tsab ntawv.
Tsis tas li ntawd, yuav ua li cas ntxiv defer hauv JavaScript?
Cov DEFER Txoj Kev Koj ua tau ntxiv lub ncua ” tus cwj pwm rau txhua qhov ntawm koj lub cim npe sab nraud. Dab tsi yog ' ncua ' attribute puas yog qhia lub web browser kom tsis txhob thauj nws mus txog thaum HTML tau ua tiav kev thauj khoom.
Kuj Paub, dab tsi yog async defer? Async vs Defer Nrog async , cov ntaub ntawv tau downloaded asynchronously thiab ces tua sai li sai tau thaum nws yog downloaded. Nrog ncua , cov ntaub ntawv tau rub tawm asynchronously, tab sis tsuas yog ua tiav thaum cov ntaub ntawv parsing tiav. Nrog ncua , scripts yuav ua tib yam li lawv hu.
Ib yam li ntawd, koj puas tuaj yeem ncua jQuery?
Cov jQuery . Kev ncua txoj kev ua tau yuav dhau ib qho kev xaiv ua haujlwm, uas yog hu ua ua ntej txoj kev rov qab los thiab dhau qhov tshiab ncua khoom raws li ob qho tib si cov khoom no thiab raws li thawj qhov kev sib cav rau cov haujlwm. Cov haujlwm hu ua ua tau txuas callbacks siv ncua.
Qhov twg yog qhov zoo dua async lossis ncua?
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.
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