neovim-config/lua/lsp_config/lua.lua

vim.cmd [[ packadd nvim-lspconfig ]]
vim.cmd [[ packadd completion-nvim ]]

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

require "lspconfig".html.setup {
    on_attach = lsp_on_attach,
    capabilities = html_snippet_capabilities,
    cmd = {"html-languageserver", "--stdio"},
    filetypes = {"html"},
    init_opitons = {
        configurationSection = {"html", "css", "javascript"},
        embeddedLanguages = {
            css = true,
            javascript = true
        }
    }
}

vim.g.completion_enable_snippet = "UltiSnips"