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Kodi mudayikapo z-index: 99999 pa chinthu mu CSS yanu, ndipo sichimatuluka pamwamba pa zinthu zina? Mtengo wokulirapo uyenera kuyika chinthucho pamwamba pa china chilichonse, kutengera kuti zinthu zonse zayikidwa pamtengo wotsika kapena osayikidwa konse. Tsamba lawebusayiti nthawi zambiri limayimiriridwa ndi magawo awiri; komabe, pogwiritsa ntchito mawonekedwe apadera a CSS, ndege yongoyerekeza ya z-axis imayambitsidwa kuti iwonetse kuya. Ndege iyi imakhala yowonekera pazenera, ndipo kuchokera pamenepo, wogwiritsa ntchito amawona dongosolo la zinthu, chimodzi pamwamba pa chimzake. Lingaliro kumbuyo kwa z-axis yongoganiza, malingaliro a wogwiritsa ntchito pazinthu zodulidwira, ndikuti katundu wa CSS omwe amawapanga amaphatikizana kupanga zomwe timatcha kuti stacking. Tilankhula za momwe zinthu "zimasungidwira" patsamba, zomwe zimawongolera kusungika, ndi njira zogwirira ntchito "zosasunthika" zikafunika. About Stacking Contexts Ingoganizirani tsamba lanu ngati desiki. Pamene mukuwonjezera zinthu za HTML, mukuyala mapepala, chimodzi pambuyo pa chimzake, pa desiki. Pepala lomaliza lomwe laikidwa likufanana ndi HTML yomwe yangowonjezeredwa posachedwa, ndipo imakhala pamwamba pa mapepala ena onse omwe adayikidwa patsogolo pake. Uwu ndiye mayendedwe abwinobwino a zikalata, ngakhale pazinthu zomwe zasungidwa. Desiki lokha limayimira mizu yoyika mizu, yopangidwa ndi element, yomwe ili ndi zikwatu zina zonse. Tsopano, zinthu zina za CSS zikubwera. Katundu ngati malo (omwe ali ndi z-index), kusawoneka bwino, kusintha, ndi kukhala) kumakhala ngati chikwatu. Foda iyi imatenga chinthu ndi ana ake onse, kuwachotsa pagulu lalikulu, ndikuwagawa m'magulu ang'onoang'ono, ndikupanga zomwe timatcha kuti stacking. Pazinthu zokhazikitsidwa, izi zimachitika tikalengeza z-index mtengo osati auto. Pazinthu monga opacity, kusintha, ndi fyuluta, mawu osungira amapangidwa okha pamene zofunikira zinazake zitagwiritsidwa ntchito.

Yesetsani kumvetsa izi: Kapepala (i.e., chinthu cha mwana) chikakhala mkati mwa foda (i.e., mawu a kholo), sichitha kutuluka chikwatucho kapena kuikidwa pakati pa mapepala mufoda ina. Z-index yake tsopano ndiyofunika mkati mwa foda yake.

M'chithunzi chomwe chili pansipa, Pepala B tsopano ili mkati mwachikwatu cha Foda B, ndipo itha kuyitanidwa ndi mapepala ena mufoda.

Tangoganizani, ngati mukufuna, muli ndi zikwatu ziwiri pa desiki yanu:

.foda-a {z-index: 1; } .foda-b {z-index: 2; }

Tiyeni tisinthire chizindikirocho pang'ono. M'kati mwa Foda A muli tsamba lapadera, z-index: 9999. Mkati mwa Foda B muli tsamba losavuta, z-index: 5.

.tsamba lapadera { z-index: 9999; } .tsamba losavuta {z-index: 5; }

Ndi tsamba liti lomwe lili pamwamba? Ndilo .plain-page mu Folder B. Msakatuli amanyalanyaza mapepala a mwanayo ndikuyika zikwatu ziwiri poyamba. Imawona Foda B (z-index: 2) ndikuyika pamwamba pa Foda A (z-index: 1) chifukwa tikudziwa kuti awiri ndi aakulu kuposa mmodzi. Pakalipano, tsamba la .special lakhazikitsidwa ku z-index: tsamba la 9999 liri pansi pa stack ngakhale kuti z-index yake yayikidwa pamtengo wapamwamba kwambiri. Zosungirako zitha kukhazikitsidwanso (zikwatu mkati mwa zikwatu), kupanga "mtundu wabanja." Mfundo yomweyi ikugwiranso ntchito: mwana sangathawe chikwatu cha makolo ake. Tsopano popeza mwazindikira momwe masanjidwe amakhalira ngati zikwatu zomwe zimayika gulu ndikukonzanso zigawo, ndikofunikira kufunsa: chifukwa chiyani zinthu zina - monga kusintha ndi kusanja - zimapanga mawonekedwe atsopano? Nachi chinthu: katunduwa samapanga ma stacking nkhani chifukwa cha momwe amawonekera; amachita izi chifukwa cha momwe osatsegula amagwirira ntchito pansi pa hood. Mukayika kusintha, mawonekedwe, zosefera, kapena mawonekedwe, mukuuza osatsegula kuti, "Hei, chinthu ichi chikhoza kusuntha, kuzungulira, kapena kuzimiririka, ndiye khalani okonzeka!"

Mukamagwiritsa ntchito zinthuzi, msakatuli amapanga ma stacking atsopano kuti azitha kuyendetsa bwino kwambiri. Izi zimalola msakatuli kuti azitha kugwiritsa ntchito makanema ojambula pawokha, kusintha, ndi zowoneka mwaokha, kuchepetsa kufunika kowerengeranso momwe zinthuzi zimalumikizirana ndi tsamba lonse. Ganizilani izi monga msakatuli akunena kuti, "Ndigwira chikwatu ichi padera kuti ndisasinthe desiki lonse nthawi iliyonse ikasintha mkati mwake." Koma alipozotsatira za mbali. Msakatuli akakweza chinthu kukhala chosanjikiza chake, chiyenera "kuphwanyidwa" chilichonse chomwe chili mkati mwake, ndikupanga mawu atsopano. Zili ngati kuchotsa chikwatu pa desiki kuti muzichigwira padera; Chilichonse chomwe chili mkati mwa fodayo chimagawidwa m'magulu, ndipo msakatuli tsopano amachitenga ngati gawo limodzi posankha zomwe zili pamwamba pa zomwe. Chifukwa chake ngakhale mawonekedwe osinthika ndi owoneka bwino sangawonekere kuti akhudza momwe zinthu zimayendera, zimatero, ndipo ndikukwaniritsa bwino ntchito. Zina zingapo za CSS zimathanso kupanga ma stacking pazifukwa zofanana. MDN imapereka mndandanda wathunthu ngati mukufuna kukumba mozama. Pali zochepa chabe, zomwe zimangowonetsera momwe zimakhalira zosavuta kupanga mosazindikira kupanga ma stacking popanda kudziwa. Vuto la "Unstacking". Mavuto a stacking angabwere pazifukwa zambiri, koma zina ndizofala kuposa zina. Ma modal ndi mawonekedwe apamwamba chifukwa amafunikira kuti asinthe gawolo kuti "litsegule" pamwamba pa zinthu zina zonse, kenako ndikuchotsa pamwamba pomwe "chatsekedwa." Ndine wotsimikiza kuti tonsefe takumana ndi vuto lomwe timatsegula modal ndipo, pazifukwa zilizonse, sizikuwoneka. Sikuti sichinatsegulidwe bwino, koma kuti sichikuwoneka m'munsi mwazolemba za stacking. Izi zimakupangitsani kudabwa "bwanji?" kuyambira pomwe mudakhazikitsa:

.kuwonjezera { malo: okhazikika; /* imapanga mawu osungira */ z-mlozera: 1; /* amayika chinthucho pamwamba pa china chilichonse */ gawo: 0; m'lifupi: 100%; kutalika: 100vh; kusefukira: zobisika; mtundu wakumbuyo: #00000080; }

Izi zikuwoneka zolondola, koma ngati gawo la kholo lomwe lili ndi choyambitsa modal ndi chinthu chamwana mkati mwa kholo lina lomwe lakhazikitsidwanso ku z-index: 1, yomwe mwaukadaulo imayika modal mu sublayer yobisika ndi foda yayikulu. Tiyeni tiwone zochitika zenizenizo komanso zovuta zina zingapo zodziwika bwino. Ndikuganiza kuti simudzawona momwe zimakhalira zosavuta kupanga mosazindikira zinthu zomangirira, komanso momwe mungasamalire molakwika. Komanso, momwe mumabwerera kudziko loyendetsedwa zimadalira momwe zinthu zilili. Chitsanzo 1: The Trapped Modal

Mutha kuwona nthawi yomweyo modal yanu itatsekeredwa pamalo otsika ndikuzindikira kholo. Zowonjezera Zamsakatuli Madivelopa anzeru apanga zowonjezera kuti zithandizire. Zida monga "CSS Stacking Context Inspector" Chrome yowonjezera tabu yowonjezera z-index ku DevTools yanu kuti ikuwonetseni zambiri zazinthu zomwe zimapanga malo osungira.

Zowonjezera za IDE Mutha kuwonanso zovuta pakukula ndikuwonjeza ngati iyi ya VS Code, yomwe ikuwonetsa zovuta zomwe zingasungidwe mwachindunji mumkonzi wanu.

Kutsegula ndi Kubwezeretsanso Kuwongolera Titazindikira chomwe chimayambitsa, chotsatira ndikuthana nacho. Pali njira zingapo zomwe mungatsatire kuti muthane ndi vutoli, ndipo ndikuzilemba motsatira. Mutha kusankha aliyense pamlingo uliwonse, ngakhale; palibe amene angadandaule kapena kutsekereza wina. Sinthani Mapangidwe a HTML Izi zimatengedwa ngati njira yabwino kwambiri. Kuti muthane ndi vuto lokhazikika, muyenera kuti mwayika zinthu zina m'malo oseketsa mkati mwa HTML yanu. Kukonzanso tsamba kukuthandizani kukonzanso DOM ndikuchotsa vuto la ma stacking. Pezani chinthu chomwe chili ndi vuto ndikuchichotsa pamakina a HTML. Mwachitsanzo, tikhoza kuthetsa nkhani yoyamba, "The Trapped Modal," pochotsa .modal-container kuchokera pamutu ndikuyiyika mu element yokha.