thanks for the reply. I will wait for the major release then

I keep getting this error (more than 25 errors ) when I validate my theme (which is build on the persona theme), will it be an issue if I delete the attribute "component" from my ul, li, h2.....
examples of the errors I get:
Attribute component not allowed on element li at this point.
Attribute component not allowed on element h2 at this point.
Attribute component not allowed on element i at this point.

the answer is in this topic :
https://community.nodebb.org/topic/11906/add-a-class-to-the-body-if-the-template-is-404/3

I tested that and it works great ! thanks again for your help

is there a way to add an if statement to header.tpl where it adds the class "error_page" to the page if the 404 template is rendered (page not found)? this will help me hide the sidebar, for example, using CSS.

@PitaJ thank you so much!

I managed to make some changes on my template from the client side, but am trying to do the same thing on the server side. I am trying to create a helper. but somehow It doesn't work. here what I have done :
first I added the hook on plugin. json :
{ "hook": "filter:topics.get", "method": "clAppendTitle" }
then in library.js I added this code :
var Benchpress = require.main.require('benchpressjs');
.....
.....

library.clAppendTitle = function (params, callback) {
Benchpress.registerHelper('clAppendTitle', function () {
console.log("inside my filter");
});
callback();
};

I am trying to solve this issue for some time now. please someone help ! I am unable to figure out how to create and use helpers. I am using the last version of nodebb.

I have created 404.tpl , and added my custom message. however, I dont want anything else to appear. I tried to use Jquery to do this and it works but after the page is load, so it shows the header and footer for a second then hide them. is it possible to do so before page load ??

thank you !!

ok, I found out how. you simply create a template with the error name inside your theme. example 404.tpl
hopefully, this might help someone.

I am trying to change create a different pattern for the URL. for example :
from this URL : ...../topic/125/topic-title
to this URL : ...../fragen/topic-title

which means I want to replace topic with fragen and remove the topic number. is it possible?

I am trying to add a 404.tpl to my custom theme, as I want a custom error page to appear rather than the default one. I am not sure where to edit or add this file inside my theme. can someone help me, please?

I solved my problem, but without using a helper function. here is how I solved it:
$(window).on('action:topic.loaded', function (event, data) {
var replynum = data.postcount - 1;
console.log(replynum)
});

I have tested it and it works, every time a topic is loaded I can get the postcount.
However, I am still unable to know why my helper function is not being executed

I registered a hook, I wanto get data from the post (the data I want is post count) but somehow my function is not being fired. am I using the wrong filter ?

"hook": "filter:post.getPostData", "method": "replynum"

Thank you !

is it possible to make simple calculation inside the templates?
for example, I want the number of the replies only (not the number of posts) which means:
number of posts -1.

@baris it works! thanks a lot!

Is there a way to render the category of a post in a topic page ? something like this work inside recent page :
<a href="{config.relative_path}/category/{topics.category.slug}"> {topics.category.name}</a>
is there anything similiar where I can add inside post.tpl ?
am trying to avoide using js for this.

I am trying to add a sorting mechanism to the recent page (forum/recent) exactly like the one the category page (/forum/category/) where the topics can be sorted either from newest to oldest, oldest to newest, most posts. is that possible?