Computers, Lub cajmeem
Yuav ua li cas rau HTML mus tawm tswv yim tawm ib txoj kab?
Nyob rau hauv kev ua haujlwm ntawm tus programmer, koj tas li yuav tsum tau sau ib co ntawv nyob rau hauv daim ntawv ntawm cov lus, thiaj li yuav piav txog qee qhov code los yog cov cim rau lub neej tom ntej. Txhua hom lus nws muaj nws tus kheej syntax, uas yog vim li cas thaum tsim cov nplooj ntawv web, qhov teeb meem nquag tsis paub yuav ua li cas tawm tswv yim tawm ib txoj kab hauv HTML los yog ib qho me me xwb.
Lus hauv HTML
Thaum tsim lub vev xaib, qee zaus nws yog ib qho tsim nyog yuav tsum tau muab qee qhov cim tseg los sis sau ib daim ntawv rau tus programmer. Hauv kev txiav txim siab tsis siv cov ntawv sau ntxiv, piv txwv, xa ib feem ntawm txoj cai rau lwm cov ntaub ntawv, koj yuav tsum paub txog kev tawm tswv yim tawm hauv HTML.
Tsis zoo li ntau cov lus programming, HTML tsis muaj ib qho kev ua tshwj xeeb los yog lossis los ua ib qho kev tawm tswv yim. Yog tias tsim nyog, "nkaum" tsuas yog ib kab los yog ib feem ntawm nws, koj yuav tsum siv cov cuab yeej hom lus. Txawm li cas los xij, koj tuaj yeem ua qhov no rau ntau txoj hauv kev.
Txheem cai
Nyob rau hauv HTML, tawm tswv yim tawm ib qho ntawm cov code yog cov uas yooj yim los ntawm kev siv cov cim tshwj xeeb. Ua ntej pib ntawm kev tawm tswv yim nws tseem tsim nyog los qhia "". Yog li, txhua yam uas tshwm hauv cov qauv no yuav muab zais rau tus neeg siv thaum lub nplooj ntawv nce.
Nws yuav tsum raug sau tseg tias thaum ua hauj lwm nrog cov lus tawm tswv yim nws tseem ceeb heev kom tsis tshua muaj attentive. Txhais qhov ciaj ciam, nws yog qhov yuav tsum tau xyuas seb puas muaj cov lus qhib lossis kaw lus xaus, qhov thib ob uas nws tseem nyob sab nraud ntawm nws - qhov no yog qhov kev thauj ntawm nplooj ntawv yuav tsis muaj tseeb. Ntxiv thiab, koj tsis tuaj yeem tsim ob peb lus ntxiv hauv tib lub tswv yim - nrog qhov kev sau ntawv no, thawj lub teeb liab mus rau qhov kawg ntawm tshooj lus tawm yuav qhib tag nrho tom qab ntawm cov ntawv nyeem.
Hauv qab no yog ib qho piv txwv ntawm txoj kev sau:
Qhov no yog ib qho tawm.
->
Tus lossis
Nyob rau hauv HTML, koj tuaj yeem tawm tswv yim qhia tawm uas yog siv tus cim tshwj xeeb ntawm cov cim npe -
Nyob rau hauv cov piv txwv hauv qab no, cov nplooj ntawv loads nyob rau hauv cov browsers yuav tso saib ib tug dawb daim ntawv, thiab nyob rau hauv lwm cov kev pab nyob rau sab yuav tau sau ntawv "Qhov no yog ib tug saib" :
Qhov no yog ib cov lus
.
Tus qauv tsis yog tus qauv
Ntxiv nrog rau txoj kev sib txawv, hauv HTML koj tuaj yeem tawm tswv yim tawm cov cai uas siv cov kev. Ntxiv rau cov lus ntawm cov lus yooj yim ntawm HTML, lub cev ntawm nplooj ntawv feem ntau qhia cov ntawv cim npe thiab cov ntawv cim lus. Hauv txhua tus ntawm lawv kuj muaj lawv cov lus txhais ntawm cov lus.
Yog li, yog hais tias koj muab qhov tseem ceeb ntawm txoj cai nyob rau hauv ib qho ntawm cov cim npe, ces hauv koj siv tau lwm txoj kev los tawm tswv yim rau ib feem ntawm cov cai ntawm cov HTML nplooj ntawv. Cov tswv yim zoo li no tsis yog siv rau niaj hnub kev xyaum, txawm li cas los, rau qhov tus kheej txoj kev loj hlob lossis, yog tias tsim nyog, kom tsis txhob pom qhov tshwm sim ntawm cov ntawv, lawv tuaj yeem siv.
Thaum koj siv daim ntawv sau lossis cov ntawv sau, cov lus yuav ua tau ib zaug los yog ntau kab. Cov thawj xub tau txhais los ntawm "//" tsim, uas, los ntawm lub sijhawm sau cov cim no, cov lus hais nyob rau seem ntawm kab. Yuav zais ib qho ntawm txoj cai, siv cov "/ *" syntax rau kev qhib, thiab "* /" mus kaw qhov lus. Nyob rau hauv cov kev tshwm sim uas tom qab lub "/ *" cim cov qauv siv kaw tsis sau, tag nrho cov seem ntxiv HTML yuav tawm tswv yim.
Hauv qhov ua piv txwv qhia txog txoj kev tsis tshua muaj tus txheej txheem sau tseg:
> / *
Qhov no yog ib qho tawm. * /
.
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