You will find this useful when creating responsive designs that work well on small screens.

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The attached Javascript gives a container different CSS classes (single_line or multiple_lines) depending on whether its children render on one line or multiple lines.

Initialize it with the selectors for container and children:

$(function() {
  $('.navigation').countLines('a');
});

You can now use different CSS styles like this:

.navigation
  &.single_line a
    // styles when all anchors are rendered on the same line
  &.multiple_lines a
    // styles when anchors are rendered on multiple lines