Make background image responsive

问题

I want to make background image responsive both in width as well as in height so that i can run it in mobile.

I have used this

.your_background_class_name {
    width: 100%;
    height:auto;
    top: 0px;
    left: 0px;
    z-index: -1;
    position: absolute;

}

but it works in width only not in height. What changes should i do to make it work?

回答1:

html { 
  background: url(https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcSvctt0I--skoKQVfuVt-i4Et6vQ5ve7lXPkLy9sTElCWLKh1Ps) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

Know more about background-size here.

See demo

回答2:

The following code should do the trick:

class_name {
    background: url(image);
    background-size: 100% auto contain;
}

回答3:

This worked for me:

#header {
background-image: url('http://www.fillmurray.com/g/1920/1080');
background-repeat:no-repeat;
background-size: 100%;
background-position:top left;
position: relative;
}

#header .container {
height: 893px;
position: relative;
}

#header .div1 {
position: absolute;
top: 20px;
}

#header .div2 {
position: absolute;
bottom: 20px;
right: 20px;
}

<div id="header">
<div class="container">
    <div class="div1">
        Top left content
    </div>
    <div class="div2">
        Bottom right content
    </div>
</div>

来源：https://stackoverflow.com/questions/22556250/make-background-image-responsive