I really like line-clamp, but no support for firefox yet.. so i go with a math calc and just hide the overflow
.body-content.body-overflow-hidden h5 {
max-height: 62px;/* font-size * line-height * lines-to-show(4 in this case) 63px if you go with jquery */
overflow: hidden;
}
.body-content h5 {
font-size: 14px; /* need to know this*/
line-height:1,1; /*and this*/
}
now lets say you want to remove and add this class via jQuery with a link, you will need to have an extra pixel so the max-height it will be 63 px, this is because you need to check every time if the height greather than 62px, but in the case of 4 lines you will get a false true, so an extra pixel will fix this and it will no create any extra problems
i will paste a coffeescript for this just to be an example, uses a couple of links that are hidden by default, with classes read-more and read-less, it will remove the ones that the overflow is not need it and remove the body-overflow classes
jQuery ->
$('.read-more').each ->
if $(this).parent().find("h5").height() < 63
$(this).parent().removeClass("body-overflow-hidden").find(".read-less").remove()
$(this).remove()
else
$(this).show()
$('.read-more').click (event) ->
event.preventDefault()
$(this).parent().removeClass("body-overflow-hidden")
$(this).hide()
$(this).parent().find('.read-less').show()
$('.read-less').click (event) ->
event.preventDefault()
$(this).parent().addClass("body-overflow-hidden")
$(this).hide()
$(this).parent().find('.read-more').show()