Vim li cas koj yuav tsum siv tus xaiv? Nws yog qhov kev coj ua zoo tshaj plaws rau khaws koj lub Redux khw hauv xeev tsawg thiab muab cov ntaub ntawv los ntawm lub xeev raws li xav tau. Selectors pab nrog qhov ntawd. Lawv tuaj yeem suav cov ntaub ntawv muab los, tso cai rau Redux khaws lub xeev tsawg kawg nkaus.
Vim li cas peb thiaj siv cov xaiv?
A selector yog ib qho ntawm cov khoom ntawm cov khoom uas peb siv nrog rau kev teeb tsa. Ib tus neeg xaiv yog siv los txheeb xyuas txhua qhov tshwj xeeb rau hauv cov khoom cog, thiab nws kuj txhais tau tias cov khoom tam sim no tau sawv cev li cas hauv HTML DOM.
Dab tsi yog siv cov xaiv hauv Redux?
Selectors yog cov haujlwm uas coj Redux xeev raws li kev sib cav thiab xa rov qab qee cov ntaub ntawv kom dhau mus rau cov khoom. const getUserData=xeev=> xeev.
Kuv puas tuaj yeem siv tus xaiv hauv qhov txo qis?
Nws tsis yog ib txwm muaj peev xwm siv cov khoom xaiv sab hauv ntawm cov khoom txo qis, vim tias cov hlais txo qis tsuas yog nkag mus rau nws tus kheej daim ntawm Redux xeev, thiab cov neeg xaiv feem ntau xav tias yuav muab cov tag nrho Redux hauv paus xeev raws li kev sib cav.
Tus xaiv yog dab tsi hauv qhov tshwm sim?
useSelector yog ua haujlwm uas siv lub xeev tam sim no los ua kev sib cav thiab xa rov qab cov ntaub ntawv koj xav tau los ntawm nws. Nws zoo ib yam li mapStateToProps thiab nws tso cai rau koj khaws cov txiaj ntsig rov qab rau hauv qhov sib txawv hauv qhov kev ua haujlwm ntawm koj cov khoom siv ua haujlwm es tsis txhob dhau mus ua khoom siv.
