password-toggle.scss

.password-toggle {
  $password-toggle-icon-width: 45px;
  position: relative;
  display: block;

  & input {
    padding-right: $password-toggle-icon-width;
  }
  & [type="text"] + a {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath fill='%23444' d='M29.6.4C29 0 28 0 27.4.4L21 6.8c-1.4-.5-3-.8-5-.8C9 6 3 10 0 16c1.3 2.6 3 4.8 5.4 6.5l-5 5c-.5.5-.5 1.5 0 2 .3.4.7.5 1 .5s1 0 1.2-.4l27-27C30 2 30 1 29.6.4zM13 10c1.3 0 2.4 1 2.8 2L12 15.8c-1-.4-2-1.5-2-2.8 0-1.7 1.3-3 3-3zm-9.6 6c1.2-2 2.8-3.5 4.7-4.7l.7-.2c-.4 1-.6 2-.6 3 0 1.8.6 3.4 1.6 4.7l-2 2c-1.6-1.2-3-2.7-4-4.4zM24 13.8c0-.8 0-1.7-.4-2.4l-10 10c.7.3 1.6.4 2.4.4 4.4 0 8-3.6 8-8z'/%3E%3Cpath fill='%23444' d='M26 9l-2.2 2.2c2 1.3 3.6 3 4.8 4.8-1.2 2-2.8 3.5-4.7 4.7-2.7 1.5-5.4 2.3-8 2.3-1.4 0-2.6 0-3.8-.4L10 25c2 .6 4 1 6 1 7 0 13-4 16-10-1.4-2.8-3.5-5.2-6-7z'/%3E%3C/svg%3E");
  }
  & [type="password"] + a {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32'%3E%3Cpath fill='%23444' d='M16 6C9 6 3 10 0 16c3 6 9 10 16 10s13-4 16-10c-3-6-9-10-16-10zm8 5.3c1.8 1.2 3.4 2.8 4.6 4.7-1.2 2-2.8 3.5-4.7 4.7-3 1.5-6 2.3-8 2.3s-6-.8-8-2.3C6 19.5 4 18 3 16c1.5-2 3-3.5 5-4.7l.6-.2C8 12 8 13 8 14c0 4.5 3.5 8 8 8s8-3.5 8-8c0-1-.3-2-.6-2.6l.4.3zM16 13c0 1.7-1.3 3-3 3s-3-1.3-3-3 1.3-3 3-3 3 1.3 3 3z'/%3E%3C/svg%3E");
  }
  & a {
    opacity: 0.5;
    cursor: pointer;
    display: inline-block;
    position: absolute;
    width: $password-toggle-icon-width;
    height: 35px;
    font-size: 0px;
    background-repeat: no-repeat;
    background-size: 50% auto;
    background-position: center center;
    top: 0;
    margin-left: -$password-toggle-icon-width;
    z-index: 1;
  }
}