The closest I can find is:
input[data-icon] {
padding-left: 25px;
background: url("https://static.thenounproject.com/png/101791-200.png") no-repeat left;
background-size: 20px;
}
But this icon will be removed once the JQuery's validation icon appears.
I knew Bootstrap input group can prepend and append icons, but those icons had already been reserved for other usage (in my project).
Besides, I wish the added icon is clickable as well. Added as a background image doesn't work.
