API reference for the CodeMirror 6 npm package, WASM exports, and native LSP server

Editor & LSP API

Two delivery modes from the same Go codebase:

Browser — TinyGo WASM module (380 KB / 145 KB gzipped)
Server — Native Go LSP server (stdio JSON-RPC)

CodeMirror API

`jsonata(): LanguageSupport`

Syntax highlighting only. No WASM required.

import { jsonata } from "@gnata-sqlite/codemirror"
// extensions: [basicSetup, jsonata()]

Provides: syntax highlighting, bracket matching, auto-close, code folding.

`jsonataFull(config?): LanguageSupport`

Full support: highlighting + diagnostics + autocomplete + hover.

import { jsonataFull, initWasm } from "@gnata-sqlite/codemirror"

await initWasm("/gnata-lsp.wasm", "/lsp-wasm_exec.js")

new EditorView({
  extensions: [basicSetup, jsonataFull({ schema: '...' })],
  parent: document.getElementById("editor")!,
})

Option	Type	Description
`schema`	`string`	JSON schema for field autocompletion

`initWasm(wasmUrl, execUrl): Promise<void>`

Load the TinyGo WASM module. Call once before creating editors.

`jsonataLint(): Extension`

Standalone linter extension. Use with jsonata() for manual composition.

`jsonataCompletion(config?): CompletionSource`

Standalone autocompletion source.

Schema format

{
  "fields": {
    "Account": {
      "type": "object",
      "fields": {
        "Name": { "type": "string" },
        "Order": {
          "type": "array",
          "fields": {
            "OrderID": { "type": "string" },
            "Product": { "type": "object" },
            "Price": { "type": "number" }
          }
        }
      }
    }
  }
}

Flat rows:

{ "fields": { "id": { "type": "number" }, "name": { "type": "string" } } }

Autocomplete contexts

Context	Suggestions
After `$`	Built-in function names (70+)
After `.`	Schema fields at resolved path depth
Start of expression	Top-level schema fields + functions + keywords
After operators	Fields + functions + keywords

WASM exports (low-level)

Function	Signature	Returns
`_gnataDiagnostics(src)`	`string → string`	JSON array of `{from, to, message}`
`_gnataCompletions(src, pos, schema)`	`string, number, string → string`	JSON array of completion items
`_gnataHover(src, pos, schema)`	`string, number, string → string\|null`	JSON `{from, to, text}` or null

Build tags

File	Purpose	Build constraint
`main_wasm.go`	syscall/js entry point	`//go:build js && wasm`
`main_lsp.go`	stdio JSON-RPC server	`//go:build !js`
`diagnostics.go`	Parse errors → diagnostics	shared
`completions.go`	Context-aware autocomplete	shared
`hover.go`	Function documentation	shared
`funcinfo.go`	Built-in function catalog	shared
`schema.go`	Schema parser	shared
`marshal.go`	Reflect-free AST serializer	shared

Editor & LSP API

On this page