Line izithuba, CSS, izisekelo

Namhlanje siza yezixhobo zecomputer CSS kumathuba umgca ukuphakama. Olu phawu kunceda ukwenza okubhaliweyo kube lula ukufunda. Kwakhona, oko kudla kusetyenziselwa ukuzinciphisa ubungakanani yile isiqulatho kwiphepha. Ingakumbi kuba mfundi ngezantsi nje kuphambuko emfutshane ngembali umbuzo iza kunikwa. Ngoko, ke, uya kufunda indlela ukufaka amathuba ukuphakama umgca CSS.

ulwazi oluyimfuneko

CSS ufuzisela Cascading Style Sheet, Oko kuthetha "sheets lesimbo elidityanisiweyo". Olu lwimi lusetyenziswa kumaphepha e web aguqulwe abhalwe ngolwimi olongezelelweyo (umz, HTML). Phambi kokuvela CSS mqulu yoyilo kunye eyakhelwe-ngaphakathi tags HTML, kodwa andiyithandi kakhulu nezikhukula yonke ikhowudi. Kungoko ke kwaye kwagqitywa ukudala ulwimi olutsha eya kuba noxanduva lokubhalisa. Namhlanje, CSS kunye HTML - kukho amagama amabini engenakususwa. Syntax lesimbo ilula kakhulu, isebenzisa iimpawu kunye nemilinganiselo zabo, ezifana «yangasemva: ebomvu». Ukwabela umda, kufuneka nje ukuba ubhale kuyo igama elichazayo ipropati (okanye isazisi): «umzimba {imvelaphi: ebomvu; } "Kodwa iqela ngokwayo libekwe phakathi braces. Ekupheleni komgca wayibhala kunye nenkcazelo iimpawu ukuba semicolon, kungenjalo impazamo kwenzeka.

ekhefu

Kodwa luya kuba lukwanele zemihlathi ezitshayelela, ukufumana ishishini. Line izithuba Iipropati CSS zibekiwe usebenzisa umgca-ukuphakama. It linokusetyenziswa beengxenye zonke. Le propati ngokwayo ilifa, nto leyo ethetha ukuba abantwana baya bakope izithuba kubazali babo. Umzekelo, ukuba ubhale ezi ziyalo zilandelayo: umzimba {umgca-ukuphakama: 20px}, ngoko zonke izinto kwi-page, izithuba umgca iya kulingana pixels-20. Njengoko ixabiso yale propati ingasetyenziswa kuyo nayiphi iiyunithi CSS eyaziwa (izinto - pt, pixels - px, intshi - e, njl ...). Enye indlela ukusebenzisa amaxabiso isalamane umdla okanye multipliers. Kulo mzekelo, izithuba CSS-line iya kutsalwa ukusuka element umzali. Ixabiso lokungagqibeki ithathwa ukuba elingundoqo eliqhelekileyo.

Ukuze ufumane inkcazelo engakumbi,

Ekubeni sithetha amathuba, kufanelekile ukuba sikhankanye malunga umgama phakathi oonobumba. Ukuze ubone le phawu kwi CSS ebekelwe bucala indawo eyahlukileyo, oko kukuthi unobumba-izithuba. lo myalelo umgaqo nyathelo liyafana kumgca-ukuphakama. Units neminye imilinganiselo efanayo. CSS sikhewu phakathi iileta nazo kusetyenziswa kuzo zonke izinto, kwaye nenkxaso zonke iinguqulelo yolwimi. Umzekelo mihlaba: h2 «{unobumba-sikhewu: 10px; } ". Ukuba ukudluliselwa lekhefu phakathi oonobumba element umzimba, ngoko zonke izinto ziya ilifa lo msebenzi (ukuba nexabiso elichazwa ngokucacileyo ngaphezulu).

isiphelo

Kufuneka kuqatshelwe ukuba kwezinye iibrawuza ngokuchanekileyo ukumisela umgca ukuphakama kumathuba CSS. Umzekelo, inkqubo IE (ukuya kuguqulelo 7.0) ngempazamo ubala umgama. Kulo mzekelo, kufuneka uthathe ingqalelo lokuphumla umahluko. iinguqulelo ezintsha kwale mpazamo lilungiswa browser ngokupheleleyo. Ingxaki efanayo wadibana xa usebenzisa iimpawu yokuqingqa umgama phakathi iileta. Kuzo zonke ezinye iinkqubo umyalelo data imiselwa ngokungqinelana ne-W3C (World Consortium Wide Web).