cover
<-- add a background-size class to body tag-->
+ <body class="background-size" >
<div>
<span class="v-bg-sz--cover" style="background-image('valclass.png')">
</span>
</div>
bg-size-cover version
contain
<-- add a background-size class to body tag-->
+ <body class="background-size" >
<div>
<span class="v-bg-sz-contain" style="background-image('valclass.png')">
</span>
</div>
bg-size-contain version