Video: Qhov chaw ua haujlwm li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov qhov chaw attribute qhia ib tug luv luv hint uas piav txog tus nqi uas yuav tsum tau ntawm ib tug input teb (piv txwv li tus nqi piv txwv los yog ib tug luv luv piav qhia ntawm lub hom phiaj xav). Lus Cim: Cov tus tuav tus cwj pwm ua haujlwm nrog rau cov kev nkag siab hauv qab no: ntawv nyeem, tshawb nrhiav, url, tel, email, thiab password.
Tsis tas li ntawd nug, qhov kev siv qhov chaw yog dab tsi?
Hauv computer programming, a qhov chaw yog ib tug cim, lo lus, los yog hlua ntawm cov cim uas yuav siv sij hawm qhov chaw ntawm cov ntaub ntawv zaum kawg. Piv txwv li, tus programmer yuav paub tias nws xav tau qee tus lej ntawm qhov tseem ceeb lossis qhov hloov pauv, tab sis tseem tsis tau paub tias yuav tsum nkag siab dab tsi.
Tom qab ntawd, lo lus nug yog, ua li cas koj muab qhov chaw nyob style? Lub::placeholder CSS pseudo-element sawv cev rau cov ntawv tso rau hauv ib qho lossis lub ntsiab lus.
- ::placeholder {xim: xiav; font-loj: 1.5em; }
- input::placeholder {xim: liab; font-loj: 1.2em; font-style: italic; }
- input::placeholder {xim: ntsuab; }
Kuj Paub, dab tsi yog qhov chaw?
qhov chaw (plural qhov chaw ) Ib yam dab tsi siv lossis suav nrog ib ntus lossis hloov pauv rau qee yam uas tsis paub lossis yuav tsum nyob twj ywm generic; uas tuav, qhia lossis khaws ib qho chaw rau ib yam dab tsi los tom qab. Qhov no yog qhov chaw cov ntaub ntawv, yog li koj yuav xav suav cov lej tiag tiag thaum koj muaj lawv.
Cov Screen nyeem puas nyeem cov ntawv tso rau hauv?
3 Teb. Screen nyeem ntawv xws li JAWS and NVDA ua tsis yog nyeem placeholder text , nws yog ib qho kev pom ntxiv xwb. Txawm li cas los xij, yog tias koj muab cov ntaub ntawv tseem ceeb pom (xws li hom ntawv rau cov ntaub ntawv nkag) tsis muaj laj thawj koj yuav tsum tsis txhob xa cov ntaub ntawv no mus rau screen nyeem ntawv cov neeg siv thiab.
Pom zoo:
Qhov txawv ntawm qhov chaw nyob thiab qhov chaw nyob yog dab tsi?
Qee zaum, 'txoj kev chaw nyob' hais txog koj lub cev qhov chaw nyob ntawm qib zoo dua hauv nroog. Piv txwv li, '1313Mockingbird Lane', tsis muaj lub nroog lub npe txuas nrog. Tab sis yog, feem ntau nws tsuas yog ib daim ntawv rov qab kom paub qhov txawv ntawm qhov chaw xa ntawv (thaum chiv keeb) thiab tam sim no e-mail chaw nyob, chaw nyob hauv web, IPaddress, thiab lwm yam
Qhov chaw nyob ntawm lub cev thiab qhov chaw nyob qhov chaw nyob yog dab tsi?
Qhov sib txawv yooj yim ntawm Logical thiab lub cev chaw nyob yog qhov chaw nyob Logical yog tsim los ntawm CPU hauv kev xav ntawm ib qho kev pab cuam. Ntawm qhov tod tes, qhov chaw nyob ntawm lub cev yog qhov chaw nyob uas muaj nyob hauv lub cim xeeb. Cov txheej txheem ntawm txhua qhov chaw nyob uas tsim los ntawm CPU fora program hu ua Logical Address Space
Yuav ua li cas yog tias koj sim tawm hauv qhov chaw tseem ceeb ntawm qhov chaw seem?
Yuav ua li cas yog tias koj sim tawm hauv qhov chaw tseem ceeb ntawm qhov chaw seem? Kev nkag mus yuav tsis cia koj kaw cov ntaub ntawv kom txog thaum muaj tus nqi sau
Qhov txawv ntawm qhov chaw kub thiab qhov chaw txias yog dab tsi?
Thaum lub chaw kub kub yog ib daim qauv ntawm cov chaw khaws ntaub ntawv nrog tag nrho koj cov khoom siv kho vajtse thiab software ua haujlwm nrog koj lub xaib thawj zaug, qhov chaw txias tau muab tshem tawm - tsis muaj server hardware, tsis muaj software, tsis muaj dab tsi. Kuj tseem muaj qhov chaw sov uas nyob nruab nrab ntawm qhov chaw kub thiab qhov chaw txias los ntawm cov khoom siv
Qhov txawv ntawm qhov chaw nyob sib txuas lus thiab qhov chaw nyob ruaj khov yog dab tsi?
Qhov chaw nyob xa ntawv yog chaw nyob sib txuas lus piv txwv li qhov koj nyob tam sim no. & chaw nyob Apermanent yog ntawm koj cov ntaub ntawv yog sau rau ntawm koj daim ntawv pov thawj hnub yug & daim npav pov npav. Qhov chaw nyob ruaj khov & kev sau ntawv yuav zoo ib yam lossis txawv ntawm cov ntaub ntawv siv tau