LESS - multiple different classes with the same style?

问题

How would you write this style below in LESS?

nav a:hover,
nav a:focus,
footer a:hover,
footer a:focus,
.fullscreen-container a:hover,
.fullscreen-container a:focus {
    text-decoration: none;
}

My attempt:

.text-decoration-none () {
    text-decoration: none;
}

nav a {
    &:focus,
    &:focus {
        .text-decoration-none ();
    }
}

footer a {
    &:focus,
    &:focus {
        .text-decoration-none ();
    }
}

.fullscreen-container a {
    &:focus,
    &:focus {
        .text-decoration-none ();
    }
}

Result:

nav a:focus,
nav a:focus {
  text-decoration: none;
}
footer a:focus,
footer a:focus {
  text-decoration: none;
}
.fullscreen-container a:focus,
.fullscreen-container a:focus {
  text-decoration: none;
}

Ideal result:

nav a:hover,
nav a:focus,
footer a:hover,
footer a:focus,
.fullscreen-container a:hover,
.fullscreen-container a:focus {
    text-decoration: none;
}

Any ideas?

回答1:

nav, footer, .fullscreen-container {
  a {
    &:hover, &:focus {
      text-decoration: none;
    }
  }
}

回答2:

.text-decoration-none () {
    text-decoration: none;
}

nav a, footer a, .fullscreen-container a {
    &:hover,
    &:focus {
        .text-decoration-none ();
    }
}

来源：https://stackoverflow.com/questions/40310268/less-multiple-different-classes-with-the-same-style