Put snippet code below into "bp-custom.php" file in folder "wp-content/plugins". If you dont have it, please create a new one
<?php
add_action( 'wp_footer', 'add_comment_hide_show' );
function add_comment_hide_show() {
?>
<style>
.activity-comments ul li[id^="acomment-"]{display: none;}
</style>
<script type="text/javascript">
jQuery(function($) {
setInterval(function() {
$('.activity-meta').each(function() {
if( !$(this).find('.show-comments').length ){
var html = '<a href="#" class="button bp-primary-action show-comments">Show/Hide Comments</a>';
$(this).find('.button.acomment-reply').after(html);
}
});
}, 500);
$('body').on('click', '.show-comments', function(e) {
e.preventDefault();
var obj = $(this).closest('.activity-content').next('.activity-comments').find('ul li[id^="acomment-"]');
obj.slideToggle();
return false;
});
});
</script>
<?php
}
/**
* Set Activity Comments Length.
*/
function yzc_set_activity_comments_length() {
?> <script type="text/javascript">window.yz_comments_length = 2;</script> <?php
}
add_action( 'wp_head' , 'yzc_set_activity_comments_length', 999 );