{{#isNot}} helper
The {{#isNot}} helper is a block helper designed to check if a specific context is not loaded. Think of it as the opposite of {{#is}} — it returns true when the page type doesn't match what you're checking for.
The argument can be a comma-separated list of context names:
- index - homepage,
 - homepage - new context for the homepage, applied when:
- the posts are displayed on the homepage (the existing index context).
 - the page is configured as a homepage (this is the key difference from index; normally, if a page is set as the homepage, it uses the page context, but with this new homepage context, the homepage can now have a dedicated context).
 - The posts appear despite a post prefix (e.g., 
/blog/) being set, but no page as the homepage is explicitly assigned. 
 - blogindex - custom post listing page when a post prefix (e.g., 
/blog/) is set in Publii; used to display posts within a specific directory, - tag - tag listing page,
 - tags - tags listing,
 - post - single post page,
 - page - single page,
 - author - author listing page,
 - 404 - 404 error page,
 - search - search results page,
 - pagination - pagination page (tag or homepage) beginning from the second page,
 - index-pagination - pagination homepage page beginning from second page,
 - tag-pagination - pagination tag page beginning from the second page.
 - author-pagination - pagination author page beginning from the second page.
 
Syntax:
{{#isNot ARGUMENT}}
This is NOT a page of the type specified in the argument
{{else}}
This IS a page of the type specified in the argument
{{/isNot}}
Examples:
{{#isNot "index"}}
Above code checks if the current page is not a homepage
{{#isNot "index,tag"}}
In the above code condition is true when current page is neither a homepage nor a tag page.
{{#isNot "post"}}
  <p>This content appears everywhere except single post pages.</p>
{{/isNot}}
This is useful when you want to show something site-wide but hide it on individual posts.
{{#isNot "404,search"}}
  {{> sidebar}}
{{/isNot}}