CSS3 Interview Questions And Answers

CSS3 is upgreaded version of CSS with new future like Selectors,Box Model, Backgrounds and Borders, Text Effects,2D/3D Transformations, Animations, Multiple Column Layout,User Interface etc

Below are the listed major modules

► Selectors
► Box Model
► Backgrounds and Borders
► Text Effects
► 2D/3D Transformations
► Animations
► Multiple Column Layout
► User Interface

Following border futures added

► border-radius
► box-shadow
► border-image

and all modern Browser Support it like below

Internet Explorer 9 supports border-radius and box-shadow

Firefox requires the prefix -moz- for border-image.

Chrome and Safari requires the prefix -webkit- for border-image.

Opera requires the prefix -o- for border-image.

We have to creat a class like below
<style>
.roundc{
border:2px solid #ff0000;
border-radius:25px;
background:#dddddd;
width:300px;
-moz-border-radius:25px; /* Firefox */
-webkit-border-radius:25px; /* Chrome and Safari */
-o-border-radius:25px; /* Opera */
}
</style>
and we have to add this class where we want the round corner like in below div
<div class="roundc" > this is the round corner by css3 </div>

By using border-image: property of css3 we can create a border using images like below
.roundpcds
{
border-image:url(borderpcds.png) 30 30 round;
-moz-border-image:url(borderpcds.png) 30 30 round; /* Firefox */
-webkit-border-image:url(borderpcds.png) 30 30 round; /* Safari and Chrome */
-o-border-image:url(borderpcds.png) 30 30 round; /* Opera */
}
.stretchPcds
{
-moz-border-image:url(borderpcds.png) 30 30 stretch; /* Firefox */
-webkit-border-image:url(borderpcds.png) 30 30 stretch; /* Safari and Chrome */
-o-border-image:url(borderpcds.png) 30 30 stretch; /* Opera */
border-image:url(borderpcds.png) 30 30 stretch;
}

Like below we can create Box Shadow using CSS3 .boxshadowpcds
{
box-shadow: 10px 10px 5px #ccccc;
}
.textshadowpcds
{
text-shadow: 5px 5px 5px #FF0000;
} and then need to use these class boxshadownpcds ,textshadowpcds

The background-size property specifies the size of the background image.
As we know Before CSS3, the background image size was find out by the real size of the image. In CSS3 it is possible to specify the size of the background image, which allows you to re-use background images in different ways.
.pcdsbp1
{
background:url(background.gif);
-moz-background-size:80px 60px; /* Firefox 3.6 */
background-size:80px 60px; /* or we can do background-size:100% 100%;*/
background-repeat:no-repeat;
}

To Allow long words to be able to break and wrap onto the next line in css3 we used word-wrap property like below class
.wordwrappcds{word-wrap:break-word;}

When the animation is created in the @keyframe, bind it to a selector, otherwise the animation will have no effect.

Bind the animation to a selector by specifying at least these two CSS3 animation properties:

► Specify the name of the animation
► Specify the duration of the animation

Opacity is used to show or hide the html element For example 0 for hide and 1 for show

<p style="opacity: 0">Show Me</p>
<p style="opacity: 0.5">Show Me</p>
<p style="opacity: 1">Show Me</p>

style="opacity:0.4;filter:alpha(opacity=40)"

Firefox uses the property opacity:x for transparency, while IE uses
filter:alpha (opacity=x).

The general syntax word-wrap property of CSS3 is as follows:
word-wrap: normal| break-word

The default initial value is normal in the above syntax.

Syntax for the usage of white-space Property of CSS3.
The general format of white-space Property of CSS3 is as follows:
white-space: nnormal | pre | nowrap | pre-wrap | pre-line

Let me know if you have any other query.

Flexibility achieved is in greater ratio in CSS3 because of the feature of handling multiple style sheets in CSS3 and because of the modularized approach of CSS3.

The five values that can be taken by property white-space of CSS3 are normal, pre, nowrap, pre-wrap and pre-line.