Event fire twice

Question

Upon request, the button to click, to fire the event is the wide-ass orange button

this fire is suppose to add 12 vh to the height of #pfcontainer_inner_friends_list, and then upon 2nd click remove the height again

By the way; I'm not looking for a solution that does not entail ADDING or SUBTRACTING the height. The height of the element has to stay on 10.2vh, and the fires, HAVE TO, add or subtract a given height.

http://jsfiddle.net/zy73nd2c/

In the fiddle above, I've tried showcasing how my jQuery is firing twice upon click. How do i fix this?

$(function () {
$('.click-nav1 > ul').toggleClass('no-js js');
$('.clicker1').click(function (e) {
    $('.click-nav1 .js ul').slideToggle(200);
    $('.clicker1').toggleClass('active');
    e.stopPropagation(); 
});
$('.clicker1').click(function () {
    if ($('.click-nav1 .js ul').is(':visible')) {
        $('.click-nav1 .js ul', this).slideUp();
        $('.clicker1').removeClass('active');
    }
});
});
$(function () {
$('.clicker1').click(function () { 
   if ($('.click-nav1 .js ul').is(':visible')) {
       $("#pfcontainer_inner_friends_list ul").animate({"height" :      "+=12vh"});}
});
});
$(function () {
$('.clicker1').click(function () { 
   if ($('.click-nav1 .js ul').is(':hidden')) {
       $("#pfcontainer_inner_friends_list ul").animate({"height" : "-    =12vh"});}
});
});

Answer 1

Instead of checking .is(':visible') check .height() :

$('.clicker1').click(function () { 
    if ($('.click-nav1 .js ul').height()>1) {
        $("#pfcontainer_inner_friends_list ul").animate({"height" : "+=12vh"});
    }else{
        $("#pfcontainer_inner_friends_list ul").animate({"height" : "-=12vh"});
    }
});

Fiddle: http://jsfiddle.net/zy73nd2c/3/

Answer 2

Apparently, .is(":visible") and .is(":hidden") can have the same value at a certain time of evaluation.

Possible work-around: Toggle a class on the $element of choice, then use $element.hasClass(...) to decide whether to increase or decrease height.

This works as js in your jsfiddle:

$(function () {
    $('.click-nav1 > ul').toggleClass('no-js js');
    $('.clicker1').click(function (e) {
        $('.click-nav1 .js ul').toggleClass('vis').slideToggle(200);
        $('.clicker1').toggleClass('active');
        e.stopPropagation(); 
    });
    $('.clicker1').click(function () {
        if ($('.click-nav1 .js ul').is(':visible')) {
            $('.click-nav1 .js ul', this).slideUp();
            $('.clicker1').removeClass('active');
        }
    });
    $('.clicker1').click(function () {
        var dh = $('.click-nav1 .js ul').hasClass('vis') ? "+=12vh" : "-=12vh";
        $("#pfcontainer_inner_friends_list ul").animate({"height" : dh});
    });
});