nvim/lua/plugins/bufferline.lua

return {
    config = {
        options = {
            mode = "buffers", -- set to "tabs" to only show tabpages instead
            themable = true, -- allows highlight groups to be overriden i.e. sets highlights as default
            numbers =  "buffer_id",
            close_command = "bdelete! %d",       -- can be a string | function, | false see "Mouse actions"
            right_mouse_command = "bdelete! %d", -- can be a string | function | false, see "Mouse actions"
            left_mouse_command = "buffer %d",    -- can be a string | function, | false see "Mouse actions"
            middle_mouse_command = nil,          -- can be a string | function, | false see "Mouse actions"
            indicator = {
                icon = '▎', -- this should be omitted if indicator style is not 'icon'
                style = 'icon',
            },
            buffer_close_icon = '󰅖',
            modified_icon = '●',
            close_icon = '',
            left_trunc_marker = '',
            right_trunc_marker = '',
            max_name_length = 18,
            max_prefix_length = 15, -- prefix used when a buffer is de-duplicated
            truncate_names = true, -- whether or not tab names should be truncated
            tab_size = 18,
            diagnostics = "nvim_lsp",
            diagnostics_update_in_insert = false,
            offsets = {
                {
                    filetype = "NvimTree",
                    text = "File Explorer",
                    text_align = "left",
                    separator = true
                }
            },
            color_icons = true, -- whether or not to add the filetype icon highlights
            show_buffer_icons = true, -- disable filetype icons for buffers
            show_buffer_close_icons = false,
            show_close_icon = false,
            show_tab_indicators = true,
            show_duplicate_prefix = true, -- whether to show duplicate buffer prefix
            duplicates_across_groups = true, -- whether to consider duplicate paths in different groups as duplicates
            persist_buffer_sort = true, -- whether or not custom sorted buffers should persist
            move_wraps_at_ends = false, -- whether or not the move command "wraps" at the first or last position
            -- can also be a table containing 2 custom separators
            -- [focused and unfocused]. eg: { '|', '|' }
            separator_style = "thick",
            enforce_regular_tabs = true,
            always_show_bufferline = true,
            hover = {
                enabled = true,
                delay = 200,
                reveal = {'close'}
            },
            sort_by = 'tabs'
        }
    }
}