Expand background on hover

Question

I have a div with a background image, what I would like to do, is when I hover over it, the hidden part of background-image to display like in the example below:

My jsfiddle example:

div.test {
  background: url(http://media2.intoday.in/indiatoday/images/Photo_gallery/emraan_012315020812.jpg);
    background-size: cover;
    width: 70px;
    height: 70px;
    background-position: center;
    border-radius: 100%;
    display: inline-block;
    transition: all 1s;
    position: absolute;
    top: 100px;

}

.test:hover{
  transform: scale(1.2);
}

body {
  
  text-align: center;
}

<div class="test">

</div>

As you can see, in my example the image is just getting larger, instead I want to display another 20px of the image (without compromising border-radius).

Answer 1

you might oversize a bit the background image (background-size:auto 90px;) and add some padding and reset position on hover (.test:hover{padding:10px; margin:-10px;})

those rules are suppose to be understood by most of actual browsers if not all.

div.test {
  background: url(http://media2.intoday.in/indiatoday/images/Photo_gallery/emraan_012315020812.jpg);
  background-size:auto 90px;
    width: 70px;
    height: 70px;
    background-position: center;
    border-radius: 100%;
    display: inline-block;
    transition: all 1s;
    position: absolute;
    top: 100px;
}

.test:hover{
  padding:10px;
  margin:-10px;;
}

body {
  
  text-align: center;
}

<div class="test">

</div>

---

another possibility is to use an inset shadow

div.test {
  background: url(http://media2.intoday.in/indiatoday/images/Photo_gallery/emraan_012315020812.jpg);
  background-size: auto 90px;
  width: 90px;
  height: 90px;
  /* hide buggy ff render */
  background-clip: content-box;
  padding: 1px;
  /* end fix ff */
  background-position: center;
  border-radius: 100%;
  display: inline-block;
  transition: all 1s;
  position: absolute;
  top: 90px;
  box-shadow: inset 0 0 0 10px white;
}
.test:hover {
  box-shadow: inset 0 0 0 0px white;
}
body {
  text-align: center;
}

<div class="test">

</div>

There is also : padding, box-sizing and background-clip

div.test {
  background: url(http://media2.intoday.in/indiatoday/images/Photo_gallery/emraan_012315020812.jpg) ;
  background-size: auto 90px;
  width: 90px;
  height: 90px;
  padding: 10px;
  background-clip:content-box;
  box-sizing:border-box;
  background-position: center;
  border-radius: 100%;
  display: inline-block;
  transition: all 1s;
  position: absolute;
  top: 90px;
}

.test:hover {
  padding:0px;
}

/* show transparency */
html {
  min-height:100%;
  text-align: center;
  background:linear-gradient(45deg, gray, yellow,purple,lime,pink,turquoise, gray, yellow,purple,lime,pink,turquoise);
}

<div class="test"></div>

Answer 2

Example with one html element:

div.test {
    background: url(http://media2.intoday.in/indiatoday/images/Photo_gallery/emraan_012315020812.jpg) no-repeat 50% 50%;
    background-size: 140px;
    width: 70px;
    height: 70px;
    background-position: center;
    border-radius: 100%;
    display: inline-block;
    transition: all 1s;
    position: absolute;
    top: 100px;
    transform-origin: center center;
}

.test:hover{
    width: 90px;
    height: 90px;
    margin-left: -10px;
    margin-top: -10px;
}

body {
  
  text-align: center;
}

<div class="test">

</div>

Example with clip-path and shape-inside:

div.test {
    background: url(http://media2.intoday.in/indiatoday/images/Photo_gallery/emraan_012315020812.jpg) no-repeat 50% 50%;
    background-size: cover;
    shape-inside: circle(30% at 50% 50%);
    clip-path: circle(30% at 50% 50%);
    -webkit-clip-path: circle(30% at 50% 50%);
    width: 70px;
    height: 70px;
    background-position: center;
    display: inline-block;
    transition: all 1s;
    position: absolute;
    top: 100px;
    transform-origin: center center;
}

.test:hover{
    shape-inside: circle(50% at 50% 50%);
    clip-path: circle(50% at 50% 50%);
    -webkit-clip-path: circle(50% at 50% 50%);
}

body {
  
  text-align: center;
}

<div class="test">

</div>

Answer 3

You are missing to remove border-radius property on the hover event:

div.test {
  background: url(http://media2.intoday.in/indiatoday/images/Photo_gallery/emraan_012315020812.jpg);
    background-size: cover;
    width: 70px;
    height: 70px;
    background-position: center;
    border-radius: 100%;
    display: inline-block;
    transition: all 1s;
    position: absolute;
    top: 100px;

}

.test:hover{
  transform: scale(1.2);
  border-radius: 0px;
}

body {
  
  text-align: center;
}

<div class="test">

</div>