Video: Module export ua dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov module khoom muaj ib yam khoom tshwj xeeb, hu ua xa tawm , qho yog lub luag hauj lwm rau kev txhais dab tsi a module ua rau muaj rau lwm yam modules siv. Hauv Node. js lus, module . xa tawm txhais cov nqi uas tus module exports.
Tsis tas li ntawd, lub hom phiaj ntawm kev xa tawm module hauv node JS yog dab tsi?
Module exports yog cov lus qhia uas qhia Node . js uas cov khoom ntawm cov cai (kev ua haujlwm, khoom, cov hlua, thiab lwm yam) rau xa tawm ” los ntawm cov ntaub ntawv muab kom lwm cov ntaub ntawv raug tso cai nkag mus rau xa tawm code.
Ib yam li ntawd, koj puas tuaj yeem muaj ntau yam khoom xa tawm? Koj tuaj yeem muaj ntau yam npe xa tawm rau module tab sis xwb ib ua ntej xa tawm . Txhua hom sib raug rau ib ntawm cov syntax saum toj no: Lub npe xa tawm : // xa tawm nta tau tshaj tawm ua ntej xa tawm { myFunction, myVariable }; // xa tawm tus kheej nta ( tuaj yeem xa tawm var, let, // const, function, class) xa tawm cia myVariable = Math.
Ib yam li ntawd, tib neeg nug, qhov txawv ntawm module exports thiab exports yog dab tsi?
module . xa tawm yeej Qhov no txhais tau hais tias yog yam khoom module . xa tawm yog muab rau yog cov khoom uas yog xa tawm ntawm koj module . Yog koj xav tau xa tawm muaj nuj nqi los ntawm koj module thiab koj muab nws rau xa tawm thiab tsis module.
Export default ua dab tsi?
export default yog siv rau xa tawm ib chav kawm, muaj nuj nqi los yog primitive. export default function() { } tuaj yeem siv tau thaum lub luag haujlwm tsis muaj npe.
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