html - How to change image size based on the resolution? -

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i trying create image enlarge or shrink based on screen resolution.

i using bootstrap , want change image size. problem image not big , not sure how enlarge image if user expend browser window.

my html like:

<div>  <img class='col-md-12' src='img.png'/> </div>

css

img{   width:100%; }

thanks help!

this you- these jquery libraries resize images on responsive view

http://responsiveimg.com/

http://responsejs.com/


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