Troubleshooting

The following guide goes from easy to complex operations that can help when this plugin is not functioning how you expect. As such it is recommended to go in order.

Run checkhealth

:checkhealth render-markdown

If there are any errors these should be looked at closely, warnings can largely be ignored. They are generated to help debug issues for less critical components, i.e. latex support.

Validate filetype

This plugin only operates on markdown files by default, but can be expanded to run on any filetype with markdown injected by providing it in the config:

require('render-markdown').setup({
    file_types = { 'markdown', <other_filetype> },
})

Once you confirm the list of filetypes you expect this plugin to work on get the filetype of the current buffer and make sure it is in that list:

:lua vim.print(vim.bo.filetype)

Validate Configuration

This is only a potential issue if you are using a distribution, as opposed to your own configuration. The configuration for this plugin could be set by the distribution to some default the author prefers. So the settings you think you are using are not necessarily the only ones be used.

Run :RenderMarkdown config, which will output only the non-default values being used, you might be surprised by what you find.

Validate Parse Tree

Create a new markdown file locally with the following content:

# Heading

- Item

> [!NOTE]
> A note

- [x] Checked

Run :InspectTree which should output the following:

(document ; [0, 0] - [8, 0]
  (section ; [0, 0] - [8, 0]
    (atx_heading ; [0, 0] - [1, 0]
      (atx_h1_marker) ; [0, 0] - [0, 1]
      heading_content: (inline ; [0, 2] - [0, 9]
        (inline))) ; [0, 2] - [0, 9]
    (list ; [2, 0] - [4, 0]
      (list_item ; [2, 0] - [4, 0]
        (list_marker_minus) ; [2, 0] - [2, 2]
        (paragraph ; [2, 2] - [3, 0]
          (inline ; [2, 2] - [2, 6]
            (inline)) ; [2, 2] - [2, 6]
          (block_continuation)))) ; [3, 0] - [3, 0]
    (block_quote ; [4, 0] - [6, 0]
      (block_quote_marker) ; [4, 0] - [4, 2]
      (paragraph ; [4, 2] - [6, 0]
        (inline ; [4, 2] - [5, 8]
          (inline ; [4, 2] - [5, 8]
            (shortcut_link ; [4, 2] - [4, 9]
              (link_text))) ; [4, 3] - [4, 8]
          (block_continuation)))) ; [5, 0] - [5, 2]
    (list ; [7, 0] - [8, 0]
      (list_item ; [7, 0] - [8, 0]
        (list_marker_minus) ; [7, 0] - [7, 2]
        (task_list_marker_checked) ; [7, 2] - [7, 5]
        (paragraph ; [7, 6] - [8, 0]
          (inline ; [7, 6] - [7, 13]
            (inline))))))) ; [7, 6] - [7, 13]

If this is not what you see you likely need to update nvim-treesitter and your treesitter parsers.

Generate Trace Logs

If all else fails hopefully the logs can provide some insight. This plugin ships with logging, however it only includes errors by default.

To help debug your issue you'll need to go through the following steps:

1) Create a Test File

Use the same file from Validate Parse Tree.

2) Update Log Level

Change plugin configuration to output trace logs:

require('render-markdown').setup({
    log_level = 'trace',
})

3) Generate Logs

To do this restart Neovim and open the markdown file from the first step.

This should trigger the rendering logic, then close Neovim.

4) Provide Logs in Issue

Logs can be retrieved by running :RenderMarkdown log.

Copy the contents and paste them into the issue.