Curs Css


CSS3 contine trei noi proprietati pentru background: background-size, background-origin si background-clip, in plus, se pot adauga mai multe imagini pt. background la un element HTML si se pot crea culori gradient cu: linear-gradient.


background-size

Proprietatea CSS background-size: width height; permite definirea lungimii si inaltimii (width height) de afisare a imaginii pt. background.

- Valori:

- Exemplu:
<style>
#id1 {
 width:200px;
 height:100px;
 border:1px solid blue;
 background:url('css/css3.jpg');
 background-size:100px 60px;
 background-repeat:no-repeat;
 margin:5px auto;
}
#id2 {
 width:300px;
 height:120px;
 border:1px solid #01da02;
 background:url('css/css3.jpg');
 background-size:contain;
 background-repeat:no-repeat;
 margin:5px auto;
}
#id3 {
 width:300px;
 height:120px;
 border:1px solid silver;
 background:url('css/css3.jpg');
 background-size:cover;
 margin:5px auto;
}
</style>

<div id="id1">Free CSS Course - size in pixels</div>
<div id="id2">coursesweb.net - size contain</div>
<div id="id3">marplo.net - size cover</div>
Rezultat:
css3 tutorial
Free CSS Course - size in pixels
css course
coursesweb.net - size contain
marplo.net - size cover

Culori Gradient

Pentru adaugare culoare gradient la fundal, se foloseste proprietatea background: linear-gradient(); cu aceasta sintaxa:
background: linear-gradient(direction, color-stop1, color-stop2, ...);
- "direction" reprezinta directia de afisarie a culorilor: "to right", "to bottom right", "top left", "top bottom" (default). Daca nu e specificata, se considera "top bottom".
- "color-stop" sunt culorile de referinta pt. gradient.

Exemplu:
<style>
#id1 {
background: linear-gradient(to bottom right, #11ee22, #fefe88, #1122fb);
height:120px;
width:300px;
}
</style>

<div id="id1">Free CSS Course<br />
coursesweb.net</div>
Rezultat:
Free CSS Course
coursesweb.net

Se poate defini si distanta de referinta a culorilor din gradient, adaugand un procent dupa valoarea culorii.
- Exemplu:
<style>
#id1 {
background: linear-gradient(to bottom right, #11ee22 0%, #fefe88 40%, #1122fb 75%);
height:120px;
width:300px;
}
</style>

<div id="id1">Free CSS Course<br />
coursesweb.net</div>

background-origin

Proprietatea CSS background-origin specifica zona de pozitionare a imaginii de fundal.
Preia una din aceste valori:
- Exemplu:
<style>
#id1 {
width:350px;
height:120px;
padding:20px;
border:3px solid blue;
background:url('css/css3.jpg');
background-repeat:no-repeat;
background-color:#bcfede;
background-origin:content-box;
}
#id2 {
width:350px;
height:120px;
padding:20px;
border:3px solid blue;
background:url('css/css3.jpg');
background-repeat:no-repeat;
background-color:#bcfede;
background-origin:border-box;
margin-top:5px;
}
</style>

<div id="id1">Position the background image within the content-box</div>
<div id="id2">Position the background image relative to the border</div>
Rezultat:
Position the background image within the content-box
Position the background image relative to the border

background-clip

Proprietatea background-clip se foloseste pentru a determina suprafata de afisare a culorii pentru fundal ( background-color ).
Preia una din aceste valori:
Exemplu:
<style>
#id1 {
 width:350px;
 height:120px;
 padding:20px;
 border:2px solid blue;
 background-color:#cdfeda;
 background-clip:padding-box;
}
#id2 {
 width:350px;
 height:120px;
 padding:20px;
 border:2px solid blue;
 background-color:#cdfeda;
 background-clip:content-box;
}
</style>

<div id="id1">background-clip with padding-box</div>
<div id="id2">background-clip with content-box</div>
Rezultat:
background-clip with padding-box
background-clip with content-box

Imagini Multiple la Background

Ca sa aplicati mai multe imagini la fundalul unui element HTML, se adauga la proprietatea css background-image functii url() (separate prin virgula) cu adresele imaginilor.
- Celelalte proprietati legate de "background-image" (background-position, background-repeat) folosesc valori separate prin virgula, in functie de modul dorit de afisare a imaginilor adaugate. Sau o singura valoare care se aplica la toate.

- Exemplu:
<style>
#id1 {
 width:400px;
 height:150px;
 background-image: url('css/html_course.jpg'), url('css/css3.jpg');
 background-repeat: no-repeat, repeat-x;
 background-position: center top, center bottom;
}
</style>

<div id="id1">Multiple background images</div>
Rezultat:
Multiple background images

Un Test simplu in fiecare zi

HTML
CSS
JavaScript
PHP-MySQL
Engleza
Spaniola
Ce element HTML adauga continut flash SWF in pagina web?
<object> <div> <script>
<object type="application/x-shockwave-flash" data="file.swf" width="500" height="250">
 <param name="src" value="file.swf" />
 Browser-ul dv. nu suporta SWF.
</object>
Care pseudo-clasa CSS adauga un stil la un camp input de formular cand e cursorul in el?
:active :focus :hover
input:focus {
  background-color: #88fe88;
}
Clic pe instructiunea care transforma un sir JSON in obiect JavaScript.
JSON.stringify(javascript_object) object.toString() JSON.parse(json_string)
var jsnstr = '{"url": "http://coursesweb.net/", "title": "Web Development Courses"}';
var obj = JSON.parse(jsnstr);
alert(obj.url);
Indicati functia PHP care poate crea sau scrie un fisier pe server.
fopen() file_put_contents() file_get_contents()
if (file_put_contents("file.txt", "content")) echo "Fisierul a fost creat";
else echo "Fisierul nu poate fi creat";
Cum se spune "al treilea" in engleza?
threeth third three
I planted the third tree.
- Am plantat al treilea pom.
Cum se spune "al treilea" in spaniola?
segundo tres tercero
Yo planté el tercero árbol.
- Am plantat al treilea pom.
CSS3 - Background proprietati noi

Last accessed pages

  1. Subjunctiv - Verbe neregulate (2146)
  2. Pronumele in limba engleza - Pronouns (55017)
  3. Prezentul continuu - Exercitii si teste incepatori (39589)
  4. Curs HTML gratuit Tutoriale HTML5 (198034)
  5. Por si Para (4141)

Popular pages this month

  1. Cursuri si Tutoriale: Engleza, Spaniola, HTML, CSS, Php-Mysql, JavaScript, Ajax (256)
  2. Gramatica limbii engleze - Prezentare Generala (138)
  3. Gramatica limbii spaniole. Indrumator si prezentare generala (131)
  4. Coduri pt culori (120)
  5. Cursuri limba engleza gratuite si lectii online (101)