Highlight symbol under cursor about lsp-zero.nvim HOT 3 CLOSED

vim.opt.updatetime = 350
vim.cmd([[
  hi! LspReferenceRead cterm=bold ctermbg=red guibg=LightYellow
  hi! LspReferenceText cterm=bold ctermbg=red guibg=LightYellow
  hi! LspReferenceWrite cterm=bold ctermbg=red guibg=LightYellow
]])

local function highlight_symbol(client, bufnr)
  if not client.supports_method('textDocument/documentHighlight') then
    return
  end

  local autocmd = vim.api.nvim_create_autocmd
  local augroup = vim.api.nvim_create_augroup('lsp_zero_highlight_symbol', {clear = false})

  vim.api.nvim_clear_autocmds({buffer = bufnr, group = augroup})

  autocmd({'CursorHold', 'CursorHoldI'}, {
    group = augroup,
    buffer = bufnr,
    callback = vim.lsp.buf.document_highlight,
  })

  autocmd({'CursorMoved', 'CursorMovedI'}, {
    group = augroup,
    buffer = bufnr,
    callback = vim.lsp.buf.clear_references,
  })
end

local lsp_zero = require('lsp-zero')

lsp_zero.on_attach(function(client, bufnr)
  lsp_zero.default_keymaps({ buffer = bufnr })
  highlight_symbol(client, bufnr)
end)