Each browser engine has a different implementation to control placeholder
styling. Use the following:
input {
text-transform: uppercase;
}
::-webkit-input-placeholder { /* WebKit browsers */
text-transform: none;
}
:-moz-placeholder { /* Mozilla Firefox 4 to 18 */
text-transform: none;
}
::-moz-placeholder { /* Mozilla Firefox 19+ */
text-transform: none;
}
:-ms-input-placeholder { /* Internet Explorer 10+ */
text-transform: none;
}
::placeholder { /* Recent browsers */
text-transform: none;
}
Needless to say, this only works in browsers that can handle placeholders. (IE9/10+)