background-sizeHotel v CSS je ena izmed najbolj uporabna - in najbolj zapletena - lastnosti ozadja. Za to lastnost lahko uporabite številne različice in različne sintakse, ki imajo različne primere uporabe. Tu je osnovni primer:
html ( background: url(greatimage.jpg.webp); background-size: 300px 100px; )To je primer sintakse za dve vrednosti za velikost ozadja. S to lastnostjo lahko uporabite štiri različne sintakse: sintaksa ključnih besed, sintaksa z eno vrednostjo, sintaksa z dvema vrednostma in sintaksa v več ozadjih.
Ključne besede
Poleg privzete vrednosti ( auto) obstajata še dve ključni besedi, s katerimi lahko uporabite background-size: coverincontain
+it+counts+for+the+width,+and+the+height+is+set+to+%3Ccode+translate%3D%22no%22+translate%3D%22no%22%3Eauto%3C/code%3E.+You+can+use+any+CSS+size+units+you+like,+including+pixels,+percentages,+ems,+viewport+units,+etc.%3C/p%3E%3Ch3%3ETwo+Values%3C/h3%3E%3Cp%3EIf+you+provide+two+values,+the+first+sets+the+background+image%E2%80%99s+width+and+the+second+sets+the+height.+Like+the+single+value+syntax,+you+can+use+whatever+measurement+units+you+like.%3C/p%3E%3Ch3%3EMultiple+Images%3C/h3%3E%3Cp%3EYou+can+also+combine+any+of+the+above+methods+and+apply+them+to+multiple+images,+simply+by+adding+commas+between+each+syntax.+Example:%3C/p%3E%3Cpre+translate%3D%22no%22+rel%3D%22CSS%22%3E%3Ccode+translate%3D%22no%22+class%3D%22language-css%22%3Ehtml+(+background:+url(greatimage.jpg.webp),+url(wonderfulimage.jpg.webp);+background-size:+300px+100px,+cover;+/*+first+image+is+300x100,+second+image+covers+the+whole+area+*/+)%3C/code%3E%3C/pre%3E%3Cp%3EKeep+background+image+stacking+order+in+mind+when+using+multiple+images.%3C/p%3E%3Ch3%3EDemo%3C/h3%3E%3Cp%3EThis+demo+shows+examples+of+%3Ccode+translate%3D%22no%22+translate%3D%22no%22%3Ecover%3C/code%3E,+%3Ccode+translate%3D%22no%22+translate%3D%22no%22%3Econtain%3C/code%3E,+and+multiple+background+images+with+a+mix+of+pixel+and+keyword+values.%3C/p%3E%3Cp+style%3D%22height:+268px;+display:+flex;+align-items:+center;+justify-content:+center;+border:+2px+solid+black;+margin:+1rem+0;+padding:+1rem;+overflow:+auto;%22+class%3D)
Oglejte si velikost ozadja pisala CSS-Tricks (@ css-tricks) na CodePen.
Sorodno
- ozadje-priloga
- posnetek za ozadje
- Barva ozadja
- slika ozadja
- izvor-izvor
- položaj ozadja
- ozadje-ponovitev
Več virov
- CSS3 Spec
- MDN
Podpora za brskalnik
| Chrome | Safari | Firefox | Opera | IE | Android | iOS |
|---|---|---|---|---|---|---|
| 3+ | 4.1+ | 3,6+ | 10+ | 9+ | 2.3+ | 4.0+ |