Puas yog kev tshwm sim keyCode deprecated?

Video: Puas yog kev tshwm sim keyCode deprecated?

2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47

key || xwm txheej . keyCode ; Yog tias cov cuab yeej ntawd muaj tus nqi tsis tau txhais, peb yuav nrhiav keyCode . keyCode muaj nyob rau hauv yuav luag tag nrho cov browsers, tab sis yog tsis pom zoo hauv spec.

Ntxiv mus, dab tsi KeyCode nkag?

#Keycode qhov tseem ceeb

Ntsiab	Code
backspace	8
tab	9
nkag	13
ua haujlwm	16

Ib tug kuj yuav nug, qhov txawv ntawm keypress thiab keydown tshwm sim? Cov keydown kev tshwm sim raug rho tawm haujlwm thaum nias tus yuam sij. Tsis zoo li cov keypress kev tshwm sim , cov keydown kev tshwm sim raug rho tawm haujlwm rau txhua tus yuam sij, tsis hais seb lawv tsim tus nqi dab tsi. Cov key nqis thiab keyup xwm txheej muab ib tug code qhia tias tus yuam sij yog nias, thaum nias qhia tias tus cwj pwm twg tau nkag mus.

Ib yam li ntawd, vim li cas peb thiaj xav tau cov khoom tshwm sim los tuav cov xwm txheej keyboard?

Cov tus yuam sij cov cuab yeej ntawm xwm txheej khoom tso cai rau kom tau tus cwj pwm, thaum lub code cuab yeej ntawm lub xwm txheej khoom tso cai kom tau txais "lub cev tus yuam sij code". Piv txwv li, tib yam tus yuam sij Z tuaj yeem nias nrog lossis tsis ua haujlwm. Qhov ntawd muab peb ob lub cim sib txawv: tus lej z thiab tus lej loj Z.

Dab tsi yog cov lej tseem ceeb hauv JavaScript?

Nov yog cov npe ntawm ntau ntawm JavaScript KeyCodes

Nias lub keyboard	JavaScript Key Code tus nqi
backspace	8
tab	9
nkag	13
ua haujlwm	16

Pom zoo:

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