Siv cov HTML IMG lossis rau cov duab thiab cov khoom
Cov cim HTML IMG lossis siv cov duab thaij duab thiab lwm yam khoom siv sib xws hauv cov nplooj ntawv web. Cov cim no mas txhawb ob peb yam uas yuav tsum tau ua thiab xaiv tus kheej ntxiv uas ntxiv rau kev nplua nuj rau koj lub peev xwm los tsim ib qho kev sib tham, duab tsim.
Ib qho piv txwv ntawm ib qho ua tag nrho HTML IMG lossis zoo li no:
Yuav tsum tau IMG Tag Cov Qauv
SRC. Tus cwj pwm nkaus xwb koj xav tau ib daim duab los tso tawm rau ntawm nplooj ntawv web yog tus SRC tus cwj pwm. Tus cwj pwm no qhia txog lub npe thiab qhov chaw ntawm daim duab cov duab kom pom.
ALT. Yuav kom sau tau XHTML thiab HTML4, qhov ALT attribute kuj tseem yuav tsum tau ua. Cov cwj pwm no yog siv los muab cov kev txwv tsis pub luam nrog cov ntawv uas piav txog cov duab. Browsers nthuav tawm cov ntawv nyeem lwm yam. Ib co tso saib nws li ib lub pop-up thaum koj muab koj tus nas dhau daim duab, luag pom nws hauv cov khoom thaum koj cai-nias ntawm daim duab, thiab qee qhov tsis tso nws txhua.
Siv cov ntawv me tuaj qhia ntxiv txog cov duab uas tsis muaj feem los sis tseem ceeb rau cov ntawv nyeem ntawm nplooj ntawv Web. Tab sis nco ntsoov tias hauv cov vijtsam nyeem thiab lwm cov ntawv nyeem xwb, cov ntawv nyeem yuav nyeem cov ntawv qhia nrog cov ntawv nyob ntawm nplooj ntawv. Yuav tsum tsis txhob poob siab, siv cov ntawv nyeem yooj yim uas hais tias (piv txwv), "Txog Web Design and HTML" es tsis yog "logo."
Hauv HTML5, qhov ALT attribute tsis tas yuav tsum tau, vim tias koj tuaj yeem siv lub npe ntawv sau ntxiv rau nws. Koj kuj tuaj yeem siv tus cwj pwm ARIA-KEV PAUB TIAS los qhia tus ID uas muaj ib qho kev piav qhia tiav.
Cov ntaub ntawv hauv qab no tseem tsis tau yog tias daim duab yog txhob txwm zoo nkauj, xws li daim duab nyob saum toj ntawm nplooj ntawv web lossis cov duab cim. Tab sis yog tias koj tsis paub tseeb, muaj cov ntawv nyeem hauv cov ntaub ntawv.
Pom kev pom zoo IMG
Qhov dav thiab qhov siab . Koj yuav tsum tau nkag mus rau hauv tus cwj pwm ntawm ib txwm siv lub ntsiab lus thiab qhov CEEB TOOM. Thiab koj yuav tsum nco ntsoov siv qhov tiag tiag thiab tsis tau hloov koj cov dluab nrog qhov browser.
Cov cwj pwm no ua kom yooj yim ntawm cov nplooj ntawv vim hais tias qhov browser tau faib qhov chaw nyob hauv tus tsim duab, thiab tom qab ntawd tseem mus rub tawm ntawm cov ntsiab lus, es tsis tos tag nrho cov duab mus download tau.
Lwm Cov Kev Pab Txiag IMG
TITLE . Tus cwj pwm yog tus xeeb ceem thoob ntiaj teb uas tuaj yeem siv rau txhua yam HTML . Ntxiv mus, TITLE attribute cia koj ntxiv cov lus qhia ntxiv txog daim duab.
Feem ntau cov browsers txhawb TITLE tus cwj pwm, tab sis lawv ua nws nyob rau hauv ntau txoj kev. Ib co tso saib cov ntawv nyeem ua ib qhov pop-up thaum luag saib nws hauv cov ntaub ntawv thaum tus neeg siv cai khawm ntawm daim duab. Koj tuaj yeem siv TITLE tus cwj pwm los sau cov lus qhia ntxiv txog daim duab, tab sis tsis suav rau hauv cov ntaub ntawv no yog qhov muab zais lossis pom. Koj yuav tsum tau feem ntau tsis yog siv qhov no los nkaum keywords rau kev tshawb fawb xyaw. Qhov kev xyaum no yog tam sim no raug nplua los ntawm kev tshawb fawb xyaw feem ntau.
USEMAP thiab ISMAP . Cov cuab yeej ob no muab cov neeg siv khoom () thiab neeg rau zaub mov sab (ISMAP) duab duab rau koj cov duab.
LONGDESC . Tus attribute txhawb cov URLs mus ntev piav txog daim duab. Cov feature no ua rau koj cov dluab siv tau yooj yim dua.
Kev Txiav Txim thiab Cov Tsis Txaus Siab IMG
Muaj ntau yam khoom siv tam sim no tsis muaj nyob hauv HTML5 los yog deprecated hauv HTML4. Lus hauv no teb Rau HTML zoo tshaj, koj yuav tsum nrhiav lwm cov ntsiab siv kev siv cov cwj pwm.
BORDER . Tus cwj pwm no txhais tau tias qhov dav hauv pixels ntawm txhua ciam teb ncig ntawm daim duab. Nws tau raug deprecated hauv favour of CSS hauv HTML4 thiab tsis muaj nyob hauv HTML5.
ALIGN . Qhov yeeb yam no tso cai rau koj tso tus duab hauv cov ntawv nyeem thiab muaj cov ntawv nyeem nyob ib ncig ntawm nws. Koj tuaj yeem ua ib daim duab rau sab xis lossis sab laug. Nws tau raug deprecated nyob rau hauv favour ntawm ntab CSS ntiag tug hauv HTML4 thiab tsis muaj nyob hauv HTML5.
HSPACE thiab VSPACE . HSPACE thiab VSPACE cwj pwm ntxiv qhov chaw dawb (white space) horizontally (HSPACE) thiab vertically (VSPACE). Qhov chaw dawb yuav muab ntxiv rau ob qho tib si ntawm daim duab (sab saum toj thiab hauv qab lossis sab laug thiab sab xis), yog tias koj tsuas xav tau chaw seem ntawm ib sab, koj yuav tsum siv CSS. Cov cwj pwm no tau raug muab tshem tawm hauv HTML4 hauv cov txiaj ntsim ntawm CTR cov khoom ntiag tug, thiab lawv tsis muaj nyob hauv HTML5.
LOWSRC . LOWSRC tus cwj pwm muab lwm tus duab thaum koj cov duab qhov twg loj heev uas nws tau qeeb heev kawg. Piv txwv, tej zaum koj muaj ib daim duab uas yog 500KB uas koj xav muab tso rau hauv koj qhov web page, tab sis 500KB yuav siv sij hawm ntev mus download tau. Li ntawd, koj tsim tau ib daim ntawv me me ntawm daim duab, kab tias dub thiab dawb los yog cia li tsis tshua muaj siab, thiab muab tso rau hauv tus LOWSRC attribute. Cov duab me me yuav download tau thiab tso saib ua ntej, thiab tom qab ntawd thaum lub duab loj tuaj nws yuav hloov qhov tsawg-tsawg ib qhov.
LOWSRC attribute tau ntxiv rau Netscape Navigator 2.0 rau IMG lossis. Nws yog ib feem ntawm DOM qib 1 tab sis ho raug tshem tawm ntawm DOM qib 2. Qhov kev txhawb nqa Browser tau kos duab rau qhov attribute, txawm tias muaj ntau qhov chaw hais tias nws tau txais kev txhawb los ntawm txhua tus neeg siv kev lag luam niaj hnub. Nws tsis yog deprecated rau hauv HTML4 los yog dhau caij nyoog hauv HTML5 vim nws tsis yog ib qho ntawm ib qho ntawm cov ntawv qhia tshwj xeeb.
Txhob siv qhov yeeb yam no thiab es tsis txhob ua kom koj cov duab zoo dua qub kom lawv thauj khoom sai sai. Ceev ntawm nplooj thau yog ib qhov tseemceeb ntawm kev tsim Web tsim, thiab cov dluab loj loj qeeb rau hauv nplooj ntawv-txawm tias koj siv cov LOWSRC tus cwj pwm.