Tsis yog, Lub xeev yuav nyob twj ywm raws li nws yog mus txog thaum koj cov khoom tsis tuaj yeem. Yog tias koj xav ua ib yam dab tsi thaum unmounting ces koj tuaj yeem siv UseEffect nuv.
Kuv yuav rov kho kuv lub xeev li cas tom qab ua tiav?
Siv 'setState' nrog rau kev hu rov qabuas tuaj yeem thim rov qab lub xeev.
Puas hloov lub xeev rov ua dua?
Kev rov ua dua tuaj yeem tshwm sim tsuas yog tias cov khoom siv lub xeev tau hloov pauv. Lub xeev tuaj yeem hloov pauv los ntawm kev hloov pauv, lossis los ntawm kev hloov pauv ncaj qha. Cov tivthaiv tau txais lub xeev tshiab thiab React txiav txim siab yog tias nws yuav tsum rov ua cov khoom tivthaiv.
Yuav ua li cas thaum React rov ua dua?
Raws li peb twb tau pom ua ntej, React rov ua ib qho kev tivthaiv thaum koj hu rau setState muaj nuj nqi los hloov lub xeev(los yog lub luag haujlwm muab los ntawm useState nuv hauv cov khoom ua haujlwm). Yog li ntawd, cov khoom me me tsuas yog hloov kho thaum niam txiv lub xeev hloov pauv nrog ib qho ntawm cov haujlwm ntawd.
Koj rov pib lub xeev hloov pauv li cas hauv React?
Resetting States to Initial State
We have the initialState object with the initial state of our sign up form. Tom qab ntawd peb hu useState hauv App los tsim cov khoom lub xeev. Tom ntej no, peb tsim lub clearState muaj nuj nqi los rov pib lub xeev los ntawm hu rau lub setState xeev setter muaj nuj nqi nrog ib daim qauv ntawm lub initialState.
