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CSS
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#div274{
width:50%;
height:200px;
background-color:red;
transition-duration:5s;
-webkit-transition-duration:5s;
transition-timing-function: linear;
-webkit-transition-timing-function: linear;

}

#div275{
width:50%;
height:200px;
background-color:red;
transition-duration:5s;
-webkit-transition-duration:5s;
transition-timing-function: ease;
-webkit-transition-timing-function: ease;

}

#div274:active{
width:100%;
}

#div275:active{
width:100%;
}