https://jayisgames.com/spoiled-comments.js

1// *** begin SpoiledComments
2jQuery.fn.spoil = function() {
3 return this.each(function(){
4    $(this).addClass('spoiled').wrapInner('<div style="display:none;"></div>').children().hide().end()
5     .prepend('<a class="hide" href="javascript:void(0);">Spoiler</a>')
6     .children(':first').click(function(event){
7       event.preventDefault();
8       $(this).toggleClass('hide').siblings().slideToggle('fast');
9     });
10 });
11};
12
13if('function' === typeof onLoadComments) {
14  onLoadComments(function(data) {
15    $(data).find('div.spoiler').spoil();
16  });
17} else {
18  $(function(){ $('div.spoiler').spoil();});
19}
20
21$(function() {
22  $('#comments-form').bind('form-pre-serialize', function(event, form, opt, veto) {
23    var depth = 0;
24    var a = [];
25    var text = form[0].text.value;
26    var tags = text.match(/<\/?(?:spoiler)>/g);
27    if(!tags)
28      return;
29    $.each(tags, function(i, val) {
30      if(this.match(/\//)) {
31        depth -= 1;
32        if(depth < 0) {
33          a.push(i);
34          return false;
35        }
36        a.pop(i);
37      } else {
38        depth += 1;
39        a.push(i);
40      }
41    });
42    if(depth == 0)
43      return;
44    var prob = a.pop();
45    var tag = tags[prob];
46    var msg = 'unmatched ' + ((depth > 0) ? 'start' : 'end') + ' tag, "'
47      + tag.replace(/</, '&lt;').replace(/>/, '&gt;') + '"';
48    var texts = text.split(/(<\/?(?:spoiler)>)/);
49    texts = $.map(texts, function(n, i) {
50      n = n.replace(/&/, '&amp;').replace(/</, '&lt;').replace(/>/, '&gt;');
51      return (i == 2*prob+1) ? '<span class="error-tag">' + n + '</span>' : n;
52    });
53    texts = texts.join('');
54    $('#comment-preview-box').html('<div class="comment-invalid"><p>Invalid Comment Format: '+ msg +'</p><pre>'+texts+'</pre></div>');
55    xommentFormOkay();
56     veto.veto = true;
57  });
58});
59// *** end SpoiledComments