biome_js_parser 0.5.7

Biome's JavaScript parser
Documentation
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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: JsObjectBindingPattern {
                            l_curly_token: L_CURLY@4..6 "{" [] [Whitespace(" ")],
                            properties: JsObjectBindingPatternPropertyList [
                                JsObjectBindingPatternProperty {
                                    member: JsLiteralMemberName {
                                        value: JS_NUMBER_LITERAL@6..8 "5" [] [Whitespace(" ")],
                                    },
                                    colon_token: missing (required),
                                    pattern: missing (required),
                                    init: missing (optional),
                                },
                            ],
                            r_curly_token: R_CURLY@8..10 "}" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: missing (optional),
                    },
                ],
            },
            semicolon_token: missing (optional),
        },
        JsBogusStatement {
            items: [
                R_CURLY@10..12 "}" [] [Whitespace(" ")],
                EQ@12..14 "=" [] [Whitespace(" ")],
            ],
        },
        JsBlockStatement {
            l_curly_token: L_CURLY@14..16 "{" [] [Whitespace(" ")],
            statements: JsStatementList [
                JsLabeledStatement {
                    label: JsLabel {
                        value_token: IDENT@16..20 "eval" [] [],
                    },
                    colon_token: COLON@20..22 ":" [] [Whitespace(" ")],
                    body: JsExpressionStatement {
                        expression: JsStringLiteralExpression {
                            value_token: JS_STRING_LITERAL@22..28 "\"foo\"" [] [Whitespace(" ")],
                        },
                        semicolon_token: missing (optional),
                    },
                },
            ],
            r_curly_token: R_CURLY@28..29 "}" [] [],
        },
        JsEmptyStatement {
            semicolon_token: SEMICOLON@29..30 ";" [] [],
        },
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: missing (optional),
                kind: LET_KW@30..35 "let" [Newline("\n")] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsObjectBindingPattern {
                            l_curly_token: L_CURLY@35..37 "{" [] [Whitespace(" ")],
                            properties: JsObjectBindingPatternPropertyList [
                                JsObjectBindingPatternShorthandProperty {
                                    identifier: JsBogusBinding {
                                        items: [
                                            IDENT@37..42 "eval" [] [Whitespace(" ")],
                                        ],
                                    },
                                    init: missing (optional),
                                },
                            ],
                            r_curly_token: R_CURLY@42..44 "}" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@44..46 "=" [] [Whitespace(" ")],
                            expression: JsObjectExpression {
                                l_curly_token: L_CURLY@46..48 "{" [] [Whitespace(" ")],
                                members: JsObjectMemberList [
                                    JsPropertyObjectMember {
                                        name: JsLiteralMemberName {
                                            value: IDENT@48..52 "eval" [] [],
                                        },
                                        colon_token: COLON@52..54 ":" [] [Whitespace(" ")],
                                        value: JsStringLiteralExpression {
                                            value_token: JS_STRING_LITERAL@54..60 "\"foo\"" [] [Whitespace(" ")],
                                        },
                                    },
                                ],
                                r_curly_token: R_CURLY@60..61 "}" [] [],
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@61..62 ";" [] [],
        },
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: missing (optional),
                kind: LET_KW@62..67 "let" [Newline("\n")] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsObjectBindingPattern {
                            l_curly_token: L_CURLY@67..69 "{" [] [Whitespace(" ")],
                            properties: JsObjectBindingPatternPropertyList [
                                JsObjectBindingPatternProperty {
                                    member: JsLiteralMemberName {
                                        value: JS_NUMBER_LITERAL@69..70 "5" [] [],
                                    },
                                    colon_token: missing (required),
                                    pattern: missing (required),
                                    init: missing (optional),
                                },
                                COMMA@70..72 "," [] [Whitespace(" ")],
                                JsObjectBindingPatternProperty {
                                    member: JsLiteralMemberName {
                                        value: JS_NUMBER_LITERAL@72..74 "6" [] [Whitespace(" ")],
                                    },
                                    colon_token: missing (required),
                                    pattern: missing (required),
                                    init: missing (optional),
                                },
                            ],
                            r_curly_token: R_CURLY@74..76 "}" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@76..78 "=" [] [Whitespace(" ")],
                            expression: JsObjectExpression {
                                l_curly_token: L_CURLY@78..80 "{" [] [Whitespace(" ")],
                                members: JsObjectMemberList [
                                    JsPropertyObjectMember {
                                        name: JsLiteralMemberName {
                                            value: IDENT@80..84 "eval" [] [],
                                        },
                                        colon_token: COLON@84..86 ":" [] [Whitespace(" ")],
                                        value: JsStringLiteralExpression {
                                            value_token: JS_STRING_LITERAL@86..92 "\"foo\"" [] [Whitespace(" ")],
                                        },
                                    },
                                ],
                                r_curly_token: R_CURLY@92..93 "}" [] [],
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@93..94 ";" [] [],
        },
        JsVariableStatement {
            declaration: JsVariableDeclaration {
                await_token: missing (optional),
                kind: LET_KW@94..99 "let" [Newline("\n")] [Whitespace(" ")],
                declarators: JsVariableDeclaratorList [
                    JsVariableDeclarator {
                        id: JsObjectBindingPattern {
                            l_curly_token: L_CURLY@99..101 "{" [] [Whitespace(" ")],
                            properties: JsObjectBindingPatternPropertyList [
                                JsObjectBindingPatternProperty {
                                    member: JsLiteralMemberName {
                                        value: IDENT@101..109 "default" [] [Whitespace(" ")],
                                    },
                                    colon_token: missing (required),
                                    pattern: missing (required),
                                    init: missing (optional),
                                },
                                COMMA@109..111 "," [] [Whitespace(" ")],
                                JsObjectBindingPatternProperty {
                                    member: JsLiteralMemberName {
                                        value: IDENT@111..115 "eval" [] [],
                                    },
                                    colon_token: COLON@115..117 ":" [] [Whitespace(" ")],
                                    pattern: missing (required),
                                    init: missing (optional),
                                },
                            ],
                            r_curly_token: R_CURLY@117..119 "}" [] [Whitespace(" ")],
                        },
                        variable_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@119..121 "=" [] [Whitespace(" ")],
                            expression: JsObjectExpression {
                                l_curly_token: L_CURLY@121..122 "{" [] [],
                                members: JsObjectMemberList [],
                                r_curly_token: R_CURLY@122..123 "}" [] [],
                            },
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@123..124 ";" [] [],
        },
    ],
    eof_token: EOF@124..125 "" [Newline("\n")] [],
}

0: JS_MODULE@0..125
  0: (empty)
  1: (empty)
  2: JS_DIRECTIVE_LIST@0..0
  3: JS_MODULE_ITEM_LIST@0..124
    0: JS_VARIABLE_STATEMENT@0..10
      0: JS_VARIABLE_DECLARATION@0..10
        0: (empty)
        1: LET_KW@0..4 "let" [] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@4..10
          0: JS_VARIABLE_DECLARATOR@4..10
            0: JS_OBJECT_BINDING_PATTERN@4..10
              0: L_CURLY@4..6 "{" [] [Whitespace(" ")]
              1: JS_OBJECT_BINDING_PATTERN_PROPERTY_LIST@6..8
                0: JS_OBJECT_BINDING_PATTERN_PROPERTY@6..8
                  0: JS_LITERAL_MEMBER_NAME@6..8
                    0: JS_NUMBER_LITERAL@6..8 "5" [] [Whitespace(" ")]
                  1: (empty)
                  2: (empty)
                  3: (empty)
              2: R_CURLY@8..10 "}" [] [Whitespace(" ")]
            1: (empty)
            2: (empty)
      1: (empty)
    1: JS_BOGUS_STATEMENT@10..14
      0: R_CURLY@10..12 "}" [] [Whitespace(" ")]
      1: EQ@12..14 "=" [] [Whitespace(" ")]
    2: JS_BLOCK_STATEMENT@14..29
      0: L_CURLY@14..16 "{" [] [Whitespace(" ")]
      1: JS_STATEMENT_LIST@16..28
        0: JS_LABELED_STATEMENT@16..28
          0: JS_LABEL@16..20
            0: IDENT@16..20 "eval" [] []
          1: COLON@20..22 ":" [] [Whitespace(" ")]
          2: JS_EXPRESSION_STATEMENT@22..28
            0: JS_STRING_LITERAL_EXPRESSION@22..28
              0: JS_STRING_LITERAL@22..28 "\"foo\"" [] [Whitespace(" ")]
            1: (empty)
      2: R_CURLY@28..29 "}" [] []
    3: JS_EMPTY_STATEMENT@29..30
      0: SEMICOLON@29..30 ";" [] []
    4: JS_VARIABLE_STATEMENT@30..62
      0: JS_VARIABLE_DECLARATION@30..61
        0: (empty)
        1: LET_KW@30..35 "let" [Newline("\n")] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@35..61
          0: JS_VARIABLE_DECLARATOR@35..61
            0: JS_OBJECT_BINDING_PATTERN@35..44
              0: L_CURLY@35..37 "{" [] [Whitespace(" ")]
              1: JS_OBJECT_BINDING_PATTERN_PROPERTY_LIST@37..42
                0: JS_OBJECT_BINDING_PATTERN_SHORTHAND_PROPERTY@37..42
                  0: JS_BOGUS_BINDING@37..42
                    0: IDENT@37..42 "eval" [] [Whitespace(" ")]
                  1: (empty)
              2: R_CURLY@42..44 "}" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@44..61
              0: EQ@44..46 "=" [] [Whitespace(" ")]
              1: JS_OBJECT_EXPRESSION@46..61
                0: L_CURLY@46..48 "{" [] [Whitespace(" ")]
                1: JS_OBJECT_MEMBER_LIST@48..60
                  0: JS_PROPERTY_OBJECT_MEMBER@48..60
                    0: JS_LITERAL_MEMBER_NAME@48..52
                      0: IDENT@48..52 "eval" [] []
                    1: COLON@52..54 ":" [] [Whitespace(" ")]
                    2: JS_STRING_LITERAL_EXPRESSION@54..60
                      0: JS_STRING_LITERAL@54..60 "\"foo\"" [] [Whitespace(" ")]
                2: R_CURLY@60..61 "}" [] []
      1: SEMICOLON@61..62 ";" [] []
    5: JS_VARIABLE_STATEMENT@62..94
      0: JS_VARIABLE_DECLARATION@62..93
        0: (empty)
        1: LET_KW@62..67 "let" [Newline("\n")] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@67..93
          0: JS_VARIABLE_DECLARATOR@67..93
            0: JS_OBJECT_BINDING_PATTERN@67..76
              0: L_CURLY@67..69 "{" [] [Whitespace(" ")]
              1: JS_OBJECT_BINDING_PATTERN_PROPERTY_LIST@69..74
                0: JS_OBJECT_BINDING_PATTERN_PROPERTY@69..70
                  0: JS_LITERAL_MEMBER_NAME@69..70
                    0: JS_NUMBER_LITERAL@69..70 "5" [] []
                  1: (empty)
                  2: (empty)
                  3: (empty)
                1: COMMA@70..72 "," [] [Whitespace(" ")]
                2: JS_OBJECT_BINDING_PATTERN_PROPERTY@72..74
                  0: JS_LITERAL_MEMBER_NAME@72..74
                    0: JS_NUMBER_LITERAL@72..74 "6" [] [Whitespace(" ")]
                  1: (empty)
                  2: (empty)
                  3: (empty)
              2: R_CURLY@74..76 "}" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@76..93
              0: EQ@76..78 "=" [] [Whitespace(" ")]
              1: JS_OBJECT_EXPRESSION@78..93
                0: L_CURLY@78..80 "{" [] [Whitespace(" ")]
                1: JS_OBJECT_MEMBER_LIST@80..92
                  0: JS_PROPERTY_OBJECT_MEMBER@80..92
                    0: JS_LITERAL_MEMBER_NAME@80..84
                      0: IDENT@80..84 "eval" [] []
                    1: COLON@84..86 ":" [] [Whitespace(" ")]
                    2: JS_STRING_LITERAL_EXPRESSION@86..92
                      0: JS_STRING_LITERAL@86..92 "\"foo\"" [] [Whitespace(" ")]
                2: R_CURLY@92..93 "}" [] []
      1: SEMICOLON@93..94 ";" [] []
    6: JS_VARIABLE_STATEMENT@94..124
      0: JS_VARIABLE_DECLARATION@94..123
        0: (empty)
        1: LET_KW@94..99 "let" [Newline("\n")] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@99..123
          0: JS_VARIABLE_DECLARATOR@99..123
            0: JS_OBJECT_BINDING_PATTERN@99..119
              0: L_CURLY@99..101 "{" [] [Whitespace(" ")]
              1: JS_OBJECT_BINDING_PATTERN_PROPERTY_LIST@101..117
                0: JS_OBJECT_BINDING_PATTERN_PROPERTY@101..109
                  0: JS_LITERAL_MEMBER_NAME@101..109
                    0: IDENT@101..109 "default" [] [Whitespace(" ")]
                  1: (empty)
                  2: (empty)
                  3: (empty)
                1: COMMA@109..111 "," [] [Whitespace(" ")]
                2: JS_OBJECT_BINDING_PATTERN_PROPERTY@111..117
                  0: JS_LITERAL_MEMBER_NAME@111..115
                    0: IDENT@111..115 "eval" [] []
                  1: COLON@115..117 ":" [] [Whitespace(" ")]
                  2: (empty)
                  3: (empty)
              2: R_CURLY@117..119 "}" [] [Whitespace(" ")]
            1: (empty)
            2: JS_INITIALIZER_CLAUSE@119..123
              0: EQ@119..121 "=" [] [Whitespace(" ")]
              1: JS_OBJECT_EXPRESSION@121..123
                0: L_CURLY@121..122 "{" [] []
                1: JS_OBJECT_MEMBER_LIST@122..122
                2: R_CURLY@122..123 "}" [] []
      1: SEMICOLON@123..124 ";" [] []
  4: EOF@124..125 "" [Newline("\n")] []
--
object_binding_pattern.js:1:9 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × expected `:` but instead found `}`
  
  > 1 │ let { 5 } } = { eval: "foo" };
      │         ^
    2 │ let { eval } = { eval: "foo" };
    3 │ let { 5, 6 } = { eval: "foo" };
  
  i Remove }
  
--
object_binding_pattern.js:1:5 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Object and Array patterns require initializers.
  
  > 1 │ let { 5 } } = { eval: "foo" };
      │     ^^^^^
    2 │ let { eval } = { eval: "foo" };
    3 │ let { 5, 6 } = { eval: "foo" };
  
  i This pattern is declared, but it is not given an initialized value.
  
--
object_binding_pattern.js:1:11 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Expected a statement but instead found '} ='.
  
  > 1 │ let { 5 } } = { eval: "foo" };
      │           ^^^
    2 │ let { eval } = { eval: "foo" };
    3 │ let { 5, 6 } = { eval: "foo" };
  
  i Expected a statement here.
  
  > 1 │ let { 5 } } = { eval: "foo" };
      │           ^^^
    2 │ let { eval } = { eval: "foo" };
    3 │ let { 5, 6 } = { eval: "foo" };
  
--
object_binding_pattern.js:2:7 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Illegal use of `eval` as an identifier in strict mode
  
    1 │ let { 5 } } = { eval: "foo" };
  > 2 │ let { eval } = { eval: "foo" };
      │       ^^^^
    3 │ let { 5, 6 } = { eval: "foo" };
    4 │ let { default , eval: } = {};
  
--
object_binding_pattern.js:3:8 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × expected `:` but instead found `,`
  
    1 │ let { 5 } } = { eval: "foo" };
    2 │ let { eval } = { eval: "foo" };
  > 3 │ let { 5, 6 } = { eval: "foo" };
      │        ^
    4 │ let { default , eval: } = {};
    5 │ 
  
  i Remove ,
  
--
object_binding_pattern.js:3:12 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × expected `:` but instead found `}`
  
    1 │ let { 5 } } = { eval: "foo" };
    2 │ let { eval } = { eval: "foo" };
  > 3 │ let { 5, 6 } = { eval: "foo" };
      │            ^
    4 │ let { default , eval: } = {};
    5 │ 
  
  i Remove }
  
--
object_binding_pattern.js:4:15 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × expected `:` but instead found `,`
  
    2 │ let { eval } = { eval: "foo" };
    3 │ let { 5, 6 } = { eval: "foo" };
  > 4 │ let { default , eval: } = {};
      │               ^
    5 │ 
  
  i Remove ,
  
--
object_binding_pattern.js:4:23 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Expected an identifier, an array pattern, or an object pattern but instead found '}'.
  
    2 │ let { eval } = { eval: "foo" };
    3 │ let { 5, 6 } = { eval: "foo" };
  > 4 │ let { default , eval: } = {};
      │                       ^
    5 │ 
  
  i Expected an identifier, an array pattern, or an object pattern here.
  
    2 │ let { eval } = { eval: "foo" };
    3 │ let { 5, 6 } = { eval: "foo" };
  > 4 │ let { default , eval: } = {};
      │                       ^
    5 │ 
  
--
let { 5 } } = { eval: "foo" };
let { eval } = { eval: "foo" };
let { 5, 6 } = { eval: "foo" };
let { default , eval: } = {};