CSS grayscale filter (go from grayscale to full color on hover) #css #sethneilson

gistfile1.css

img:hover {
  -webkit-filter: grayscale(0%);
  -webkit-transition: .5s ease-in-out;
  -moz-filter: grayscale(0%);
  -moz-transition: .5s ease-in-out;
  -o-filter: grayscale(0%);
  -o-transition: .5s ease-in-out;
  filter: grayscale(0%);
} 

img {
  -webkit-filter: grayscale(100%);
  -webkit-transition: .5s ease-in-out;
  -moz-filter: grayscale(100%); 
  -moz-transition: .5s ease-in-out;
  -o-filter: grayscale(100%); 
  -o-transition: .5s ease-in-out;
  filter: grayscale(100%);
}

so what browsers does this support, I still have this as well on some old css which works for older browsers:
filter: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg\'><filter id='grayscale'><feColorMatrix type='matrix' values='0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0'/>#grayscale"); /* Firefox 10+, Firefox on Android /
filter: gray; / IE6-9 */

I made a Fiddle here https://jsfiddle.net/bvebgfo2/

all transition rules on "img:hover" are not necessary, since they will override the rule that already exists in "img". Might save you some bytes;)