Helix language server config

languages.toml

[language-server.typescript-language-server]
command = "typescript-language-server"
args = ["--stdio"]
config.documentFormatting = false

[language-server.tailwindcss-language-server]
command = "tailwindcss-language-server"
args = ["--stdio"]
config = { tailwindCSS = { experimental = { classRegex = [
  ["cva\\(([^)]*)\\)", "[\"'`]([^\"'`]*).*?[\"'`]"],
  ["cx\\(([^)]*)\\)",  "(?:'|\"|`)([^']*)(?:'|\"|`)"],
  ["cn\\(([^)]*)\\)",  "(?:'|\"|`)([^']*)(?:'|\"|`)"],
  ["clsx\\(([^)]*)\\)", "(?:'|\"|`)([^']*)(?:'|\"|`)"],
] } } }

[language-server.eslint]
command = "vscode-eslint-language-server"
args = ["--stdio"]

[language-server.eslint.config]
validate = "on"
experimental = { useFlatConfig = false }
rulesCustomizations = []
run = "onType"
problems = { shortenToSingleLine = false }
nodePath = ""

[[language]]
name = "rust"
auto-format = true
indent = { tab-width = 2, unit = "  " }

[[language]]
name = "typescript"
language-servers = ["typescript-language-server", "eslint", "tailwindcss-language-server"]
formatter = { command = "prettier", args = ["--stdin-filepath", "file.ts"] }
auto-format = true
indent = { tab-width = 2, unit = "  " }

[[language]]
name = "javascript"
language-servers = ["typescript-language-server", "eslint", "tailwindcss-language-server"]
formatter = { command = "prettier", args = ["--stdin-filepath", "file.js"] }
auto-format = true
indent = { tab-width = 2, unit = "  " }

[[language]]
name = "tsx"
language-id = "typescriptreact"
language-servers = ["typescript-language-server", "eslint", "tailwindcss-language-server"]
formatter = { command = "prettier", args = ["--stdin-filepath", "file.tsx"] }
auto-format = true
indent = { tab-width = 2, unit = "  " }

[[language]]
name = "jsx"
language-id = "javascriptreact"
language-servers = ["typescript-language-server", "eslint", "tailwindcss-language-server"]
formatter = { command = "prettier", args = ["--stdin-filepath", "file.jsx"] }
auto-format = true
indent = { tab-width = 2, unit = "  " }

[[language]]
name = "html"
language-servers = ["vscode-html-language-server", "tailwindcss-language-server"]
formatter = { command = "prettier", args = ["--stdin-filepath", "file.html"] }
auto-format = true
indent = { tab-width = 2, unit = "  " }

[[language]]
name = "css"
language-servers = ["vscode-css-language-server", "tailwindcss-language-server"]
formatter = { command = "prettier", args = ["--stdin-filepath", "file.css"] }
auto-format = true
indent = { tab-width = 2, unit = "  " }

ensure to add the following dependencies to make it work

npm install -g vscode-langservers-extracted@4.8.0 eslint prettier typescript-language-server typescript