SpaceVim/bundle/nvim-lspconfig/lua/lspconfig/jsonls.lua

local configs = require 'lspconfig/configs'
local util = require 'lspconfig/util'

local server_name = 'jsonls'
local bin_name = 'vscode-json-language-server'

configs[server_name] = {
  default_config = {
    cmd = { bin_name, '--stdio' },
    filetypes = { 'json' },
    init_options = {
      provideFormatter = true,
    },
    root_dir = function(fname)
      return util.root_pattern '.git'(fname) or util.path.dirname(fname)
    end,
  },
  docs = {
    -- this language server config is in VSCode built-in package.json
    package_json = 'https://raw.githubusercontent.com/microsoft/vscode/master/extensions/json-language-features/package.json',
    description = [[
https://github.com/hrsh7th/vscode-langservers-extracted

vscode-json-language-server, a language server for JSON and JSON schema

`vscode-json-language-server` can be installed via `npm`:
```sh
npm i -g vscode-langservers-extracted
```

vscode-json-language-server only provides range formatting. You can map a command that applies range formatting to the entire document:

```lua
require'lspconfig'.jsonls.setup {
    commands = {
      Format = {
        function()
          vim.lsp.buf.range_formatting({},{0,0},{vim.fn.line("$"),0})
        end
      }
    }
}
```

Neovim does not currently include built-in snippets. `vscode-json-language-server` only provides completions when snippet support is enabled. To enable completion, install a snippet plugin and add the following override to your language client capabilities during setup.

```lua
--Enable (broadcasting) snippet capability for completion
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities.textDocument.completion.completionItem.snippetSupport = true

require'lspconfig'.jsonls.setup {
  capabilities = capabilities,
}
```
]],
    default_config = {
      root_dir = [[root_pattern(".git") or dirname]],
    },
  },
}