generateImportMapJson static method

String generateImportMapJson({ bool pretty = false, })

Generates a standard W3C Import Map JSON string with imports and scopes.

When pretty is true, the output JSON string is indented with 2 spaces.

{
  "imports": {
    "zod": "https://esm.sh/zod@^3.23.0"
  }
}

Implementation

static String generateImportMapJson({bool pretty = false}) {
  final mainImports = <String, String>{};
  final scopes = <String, Map<String, String>>{};

  for (final e in _deps.entries) {
    if (e.value.subPath != null) {
      // Emit as a scopes entry.
      final baseUrl = '${e.value.cdn}/${e.value.name}@${e.value.version}/';
      scopes[baseUrl] = {e.value.specifier: e.value.url};
    } else {
      mainImports[e.key] = e.value.url;
    }
  }

  final map = <String, dynamic>{
    'imports': mainImports,
    if (scopes.isNotEmpty) 'scopes': scopes,
  };

  return pretty
      ? const JsonEncoder.withIndent('  ').convert(map)
      : jsonEncode(map);
}