+**Note:** for React to work as expected, you need your JSX filetype to be
+`javascript.jsx` or `javascriptreact` and your TSX filetype to be
+`typescript.jsx` or `typescript.tsx` or `typescriptreact`. In coc.nvim, these
+filetypes are mapped to `javascriptreact` and `typescriptreact` because that's
+what tsserver uses. For filetype like `typescript.javascript`, you need
+configure `g:coc_filetype_map` variable in vimrc.