biome_js_parser 0.5.7

Biome's JavaScript parser
Documentation
JsModule {
    bom_token: missing (optional),
    interpreter_token: missing (optional),
    directives: JsDirectiveList [],
    items: JsModuleItemList [
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: missing (optional),
                kind: LET_KW@0..4 "let" [] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsIdentifierBinding {
                            name_token: IDENT@4..6 "x" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@6..8 "=" [] [Whitespace(" ")],
                            expression: JsBogusExpression {
                                items: [
                                    JsStringLiteralExpression {
                                        value_token: JS_STRING_LITERAL@8..16 "\"hello\"" [] [Whitespace(" ")],
                                    },
                                    SATISFIES_KW@16..26 "satisfies" [] [Whitespace(" ")],
                                    TsStringType {
                                        string_token: STRING_KW@26..32 "string" [] [],
                                    },
                                ],
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@32..33 ";" [] [],
        },
    ],
    eof_token: EOF@33..34 "" [Newline("\n")] [],
}

0: JS_MODULE@0..34
  0: (empty)
  1: (empty)
  2: JS_DIRECTIVE_LIST@0..0
  3: JS_MODULE_ITEM_LIST@0..33
    0: JS_VARIABLE_STATEMENT@0..33
      0: JS_VARIABLE_DECLARATION@0..32
        0: (empty)
        1: LET_KW@0..4 "let" [] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@4..32
          0: JS_VARIABLE_DECLARATOR@4..32
            0: JS_IDENTIFIER_BINDING@4..6
              0: IDENT@4..6 "x" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@6..32
              0: EQ@6..8 "=" [] [Whitespace(" ")]
              1: JS_BOGUS_EXPRESSION@8..32
                0: JS_STRING_LITERAL_EXPRESSION@8..16
                  0: JS_STRING_LITERAL@8..16 "\"hello\"" [] [Whitespace(" ")]
                1: SATISFIES_KW@16..26 "satisfies" [] [Whitespace(" ")]
                2: TS_STRING_TYPE@26..32
                  0: STRING_KW@26..32 "string" [] []
      1: SEMICOLON@32..33 ";" [] []
  4: EOF@33..34 "" [Newline("\n")] []
--
ts_satisfies_expression.js:1:9 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × 'satisfies' expression are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.
  
  > 1 │ let x = "hello" satisfies string;
      │         ^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  i TypeScript only syntax
  
--
let x = "hello" satisfies string;