Edit in JSFiddle

$('.click').click(function () {
    if ($('.target').is(':hidden')) {
        $('.target').show();
    } else {
        $('.target').hide();
    }
});


$('.click-toggle').click(function () {
    $('.target-toggle').toggle();
});

$('.click-visibility').click(function () {
    if ($('.target-visibility').css('visibility') == 'hidden') {
        $('.target-visibility').css({
            'visibility': 'visible'
        });
    } else {
        $('.target-visibility').css({
            'visibility': 'hidden'
        });
    }
});

$('.click-opacity').click(function () {
    if ($('.target-opacity').css('opacity') == '0') {
        $('.target-opacity').css({
            'opacity': '1'
        });
    } else {
        $('.target-opacity').css({
            'opacity': '0'
        });
    }
});

<div class="wrap-js-action">
    <span class="click js-action">click to show or hide (display:block|none;)</span>
</div>
<div class="target">target</div>

<div class="wrap-js-action">
    <span class="click-toggle js-action">click to show or hide by toggle (display:block|none;)</span>
</div>
<div class="target-toggle">target toggle</div>

<div class="wrap-js-action">
    <span class="click-visibility js-action">click to show or hide (visibility:hidden|visible)</span>
</div>
<div class="target-visibility">target visibility</div>

<div class="wrap-js-action">
    <span class="click-opacity js-action">click to show or hide (opacity:0|1)</span>
</div>
<div class="target-opacity">target opacity</div>
<div>last line</div>