Kedu ihe dị iche na klas CSS selector na id? id na klaasị ojiji na HTML

Kedu ihe dị iche na klas CSS selector na id? id na klaasị ojiji na HTML

Chen WeiliangNa-eme ugbu aSEO, kwalite webụsaịtịWordPressisiokwu.

Ọ bụ ezie na amụtala m ụfọdụ ihe ọmụma HTML na CSS mbụ, ọ dị mfe ichefu ma ọ bụrụ na ejibeghị m ya nwa oge, karịsịa ojiji nke CSS.

Ya mere, ebe a anyị na-edekọ ma chịkọta ihe dị iche iche na ojiji nke CSS selector id na klas:

• id kwekọrọ na #div
• klas kwekọrọ na .div

Ọdịiche dị n'etiti id na klas

nkọwa id

• id bụ mkpado edobere, eji akọwapụta ụdịdị buru ibu na ibe weebụ, akọwapụtara n'ụdị #div
• Ọmụmaatụ: nkewa ogidi, elu, ahụ, ala, wdg...
• A na-eji kọwaa otu mmewere, nke nwere ike ịpụta naanị otu ugboro na ibe ọ bụla na enweghị ike ịkpọ ya ugboro ugboro.

nkọwa klas

• Klas bụ otu ụdị, ejiri kọwaa ụdị nkọwa zuru ezu na ibe weebụ A kọwapụtara ya n'ụdị .div ma nwee ike ịpụta ugboro ugboro.
• Dịka ọmụmaatụ: otu menu, ahịrị ederede, wdg..
• N'otu ibe ahụ, enwere ike ịkpọ ya ugboro ugboro site na ọtụtụ ihe.

Onye na-ahọpụta div n'onwe ya enweghị njirimara site na ịkọwapụta css ya, ọ na-ejikwa obosara, ịdị elu, agba ndabere, nha ederede, wdg.

GeneralE-azụmahịawebụsaịtị,wuo webụsaịtịIbe weebụ html nke mmemme a mebere na-emejuputa nhazi ibe site na CSS.

Kedu ihe bụ onye nhọpụta?

Nkọwa nke ụdị CSS ọ bụla nwere akụkụ abụọ:

选择器 {样式}

• Akụkụ dị n'ihu {} bụ "onye na-ahọpụta".
• "Nhọrọ" na-egosi ihe "ụdị" nke {}.
• N'ikwu ya n'ụzọ ọzọ, kedu akụkụ nke ibe weebụ ka "ụdị" a na-emetụta?

Ihe atụ koodu

Nke a bụ otu esi ahọrọ na ịke klaasị = "sidebar" element:

.sidebar
{ 
background-color:black;
}

Ihe na-esonụ bụ iji id = "ụkwụ" họrọ na hazie mmewere:

#footer
{ 
background-color:black;
}