Java script Select all code stopped working. What can the problem come from?

Code:

function selectCode(a){a=$(a).closest("dl").find(".cont_code,code")[0];if(window.getSelection){var c=window.getSelection();if(c.setBaseAndExtent)c.setBaseAndExtent(a,0,a,a.innerText.length-1);else{window.opera&&a.innerHTML.substring(a.innerHTML.length-4)=="<BR>"&&(a.innerHTML+=" ");var b=document.createRange();b.selectNodeContents(a);c.removeAllRanges();c.addRange(b)}}else document.getSelection?(c=document.getSelection(),b=document.createRange(),b.selectNodeContents(a),
        c.removeAllRanges(),c.addRange(b)):document.selection&&(b=document.body.createTextRange(),b.moveToElementText(a),b.select())}
       
      $(function(){
            $("dl.codebox:not(.spoiler,.hidecode)  > dd.code, dl.codebox:not(.spoiler,.hidecode)  > dd > code").closest("dl").find('dt').append('<span onClick="selectCode(this)" class="selectCode">
КОПИРАЙ&nbsp;&nbsp;КОДА</span>');
        });

if you turn off the falling leaves dose the code work again ?

@Ape I stopped the falling leaves, but the problem still exists.

Thank you for you reply @smurfavr I have ran some tests and everything looks to be ok our end

Can you please turn off your JavaScripts and then see if the problem is still there ?

I am asking this as it looks like it is only your forum that has the problem after I done tests on 6 other sites and on this support forum and can't reproduce the problem.

Excluding the java script, the codes stop and the text copy code and I can't tell if it works.

What he meant is leave only the Select Code Javascript enabled and turning off the rest of the Javascripts.

Hello @smurfavr,

Change your code to:

Code:

/* global Clipboard, jQuery*/
(function($) {
 
    $(function() {
 
        $('.post .code').each(function() {
 
            var $copy = $('<a>', {
                'class': 'fa-code-copy-button',
                'title': 'Copiar',
                'role': 'button',
                'text': 'КОПИРАЙ КОДА'
            }).css('float', 'right');
 
            $copy.prependTo($(this).parents('.codebox').not('.spoiler').find('dt'));
        });
 
        $.getScript('https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js', function() {
            new Clipboard('.fa-code-copy-button', {
                target: function(trigger) {
                    return $(trigger).parents('.codebox').find('.cont_code').get(0);
                }
            });
        });
 
    });
}(jQuery));

Your current code has an error and it's old AND it probably stopped working due to a browser update

This also works and does not depend on any external address, which can fail.

Code:

function selectCode(e) {
        var doc = document
            , text = $(e).closest("dl").find(".cont_code,code").get(0)
            , range, selection
        ;
        if (doc.body.createTextRange) {
            range = document.body.createTextRange();
            range.moveToElementText(text);
            range.select();
        } else if (window.getSelection) {
            selection = window.getSelection();       
            range = document.createRange();
            range.selectNodeContents(text);
            selection.removeAllRanges();
            selection.addRange(range);
        }
    };
    $(function(){$("dl.codebox:not(.spoiler,.hidecode)  > dd.code, dl.codebox:not(.spoiler,.hidecode)  > dd > code").closest("dl").find('dt').append('<span onClick="selectCode(this)" class="selectCode">Select all</span>')});

@pedxz, @jucarese, Thank you both codes work.