Liab kab html - txheej txheem 4

Liab kab html 4 yuav mounted nyob rau hauv ntau txoj kev. Txawm tias qhov no tej qauv rau no phenomenon yog hom lus programming tsis muab, yog li ntawd muaj tsis muaj kev txwv nyob rau hauv no hais txog. Nyob rau hauv no tsab xov xwm peb yuav siv tsis yog ib tug heev txheej txheem ntawm cov cuab yeej los tsim ib txoj kab tshiab.

1 txoj kev

Koj yuav tsum tau pib nrog lub feem ntau txoj kev. Tsuas yog nyob rau hauv cov ntaub ntawv no nws yog tsim nyog los siv kev lam, vim hais tias CSS yog inextricably txuas rau Hypertext Markup Language. Html kab liab yuav tsum tau muab teem los ntawm cov cuab yeej «ntawv nyeem-teg dleb». Nws yog txaus los qhia yam khoom, thiab qhov kev ncua deb yuav tsum tau siv rau teg dleb rau sab laug sab ntawm daim ntawv. Piv txwv li, nkag: «p {ntawv nyeem-teg dleb: 20px;}» txhais tau hais tias txoj kab liab yog ua los ntawm 20 pixels nyob rau hauv txhua pawg lus p. Raws li ib tug caij uas tus nqi yog qhia, koj yuav tau siv tej ntu ntawm cov ntawv nyeem. Nyob rau hauv qhov tseeb, cov cuab yeej no tsis teem lub kab liab, tab sis tsuas yog qhia cov teg dleb rau ntawm thawj kab ntawm cov xaiv yam khoom. Tab sis leej twg yuav pom qhov txawv? Khoom «ntawv nyeem-teg dleb» yuav noj nyob rau hauv peb ntau hom kev tseem ceeb:

• Tej pa xab tsev, e.g. px (pixels), nyob rau hauv (nti), pt (cov ntsiab lus), thiab lwm tus neeg.
• Qhov feem pua tus nqi. Nyob rau hauv cov ntaub ntawv no, coj mus rau hauv tus account qhov kev ncua deb ntawm niam txiv.
• Nej cia li los. Thaum koj qhia kom meej cov nqi ntawm cov cuab yeej no yuav yog pub los ntawm cov niam txiv lub caij.

2nd txoj kev

Nyob rau hauv html liab kab yuav tsum ntsia tsis txuas lam. Txaus ua ntej thawj cim nyob rau hauv qhov chaws ntawm cov nplooj ntawv ib ob peb khoob. Tsuas yog yuav tsum tau siv tus cim tshwj xeeb, namely «& NBSP;», vim hais tias yog koj muab tso rau ib tug tsis tu ncua qhov chaw, ces xam tau tias yog mus yuav tus tsuas yog ib qho. Thiab nrog rau kev siv lub cim no, koj yuav teev cov yam indentation. Qhov no kab liab HTML yuav tsis muaj lub ntiaj teb no daim ntawv thov, thiab koj yuav tsum muab tag nrho qhov khoob manually. Qhov no yuav thauj khoom tsawg npaum li cas thaum koj ua hauj lwm nrog ib tug loj tus naj npawb ntawm cov ntaub ntawv. Tsis tas li ntawd, qhov no txoj kev yuav tshaj tawm koj cov cai yog invalid nplooj ntawv.

Peb txoj kev uas yuav

Siv Underscore, masked los ntawm keeb kwm yav dhau. Nyob rau hauv no txoj kev, koj yuav tau siv tej cim. Qhov tseem ceeb tshaj - mus hloov lub font xim ntawm cov ntawv nyeem fragment mus rau coincide nrog rau tom qab. Cia cov qauv no yog tsis ntau npaum, tab sis efficiency ntawm 100%. Yog li ntawd ib zaug ntxiv dua peb rov qab ua:

• Thaum pib ntawm lub kab mus tau ntxig ib tug ob peb rov muaj dua cim, xws li: ___.
• Tom ntej no, koj yuav tau hloov lub font xim ntawm lub cim nyob rau hauv lub txuam nrog rau tom qab.
• Taw ib tug hloov number case yuav ua tau los ntawm tej yam paub txhais tau tias, piv txwv li, siv CSS-style los yog txhais tau tias HTML.
• Qhov no txoj kev yog tsis haum yog ib cov duab tom qab yog xaiv, raws li peb cim yuav tsum tseem ceeb.
• Nws yog ib nqi sau cia hais tias lub qee ntawm cov neeg siv ntawv nyeem fragment yuav pom fake liab txoj hlua html.

4 txoj kev

Cov kab liab nyob rau hauv lub html tau teem los ntawm ntau yam txhais tau tias. Yog hais tias tsis muaj ntawm cov saum toj no txoj kev yog tsis haum, peb muab rau koj ib tug dawb paug duab. Pob tshab dluab muaj peev xwm tsim hom ntawv png los yog gif (tsuas lawv muaj no muaj peev xwm) los yog coj ib tug jpeg duab thiab sau nws nrog cov xim tom qab. Tom ntej no, koj cia li yuav tsum tau ntxig ib daim duab uas siv tus tag .

xaus

Raws li ib tug xaus peb yuav hais tias ua ke nrog rau cov html CSS tso cai rau koj mus ua ib tug ntau yam los ntawm. Tej zaum cov zog thiab cov ntsiab yog siv off-daim ntawv lo, tab sis tsis tau ib yam nkaus thiab thim ntawm lub txheem lossis qhov tseem ceeb.