fail to change placeholder color with Bootstrap 3

Question

Two questions:

1. I am trying to make the placeholder text white. But it doesn\'t work. I am using Bootstrap 3. JSFiddle demo

2. Another question is h

Answer 1

Boostrap Placeholder Mixin:

@mixin placeholder($color: $input-color-placeholder) {
  // Firefox
  &::-moz-placeholder {
    color: $color;
    opacity: 1; // Override Firefox's unusual default opacity; see https://github.com/twbs/bootstrap/pull/11526
  }
  &:-ms-input-placeholder { color: $color; } // Internet Explorer 10+
  &::-webkit-input-placeholder  { color: $color; } // Safari and Chrome
}

now call it:

@include placeholder($white);