@babel/parser

property allowCallParenthesized

allowCallParenthesized?: boolean;

property decoratorsBeforeExport

decoratorsBeforeExport?: boolean;

property all

all?: boolean;

property enums

enums?: boolean;

property code

code: string;

property reasonCode

reasonCode: string;

property allowAwaitOutsideFunction

allowAwaitOutsideFunction?: boolean;

• By default, await use is not allowed outside of an async function. Set this to true to accept such code.

property allowImportExportEverywhere

allowImportExportEverywhere?: boolean;

• By default, import and export declarations can only appear at a program's top level. Setting this option to true allows them anywhere where a statement is allowed.

property allowNewTargetOutsideFunction

allowNewTargetOutsideFunction?: boolean;

• By default, new.target use is not allowed outside of a function or class. Set this to true to accept such code.

property allowReturnOutsideFunction

allowReturnOutsideFunction?: boolean;

• By default, a return statement at the top level raises an error. Set this to true to accept such code.

property allowSuperOutsideMethod

allowSuperOutsideMethod?: boolean;

property allowUndeclaredExports

allowUndeclaredExports?: boolean;

• By default, exported identifiers must refer to a declared variable. Set this to true to allow export statements to reference undeclared variables.

property annexB

annexB?: boolean;

• By default, Babel parser JavaScript code according to Annex B syntax. Set this to false to disable such behavior.

property attachComment

attachComment?: boolean;

• By default, Babel attaches comments to adjacent AST nodes. When this option is set to false, comments are not attached. It can provide up to 30% performance improvement when the input code has many comments. @babel/eslint-parser will set it for you. It is not recommended to use attachComment: false with Babel transform, as doing so removes all the comments in output code, and renders annotations such as /* istanbul ignore next */ nonfunctional.

property createParenthesizedExpressions

createParenthesizedExpressions?: boolean;

• By default, the parser adds information about parentheses by setting extra.parenthesized to true as needed. When this option is true the parser creates ParenthesizedExpression AST nodes instead of using the extra property.

property errorRecovery

errorRecovery?: boolean;

• By default, Babel always throws an error when it finds some invalid code. When this option is set to true, it will store the parsing error and try to continue parsing the invalid input file.

property plugins

plugins?: ParserPlugin[];

• Array containing the plugins that you want to enable.

property ranges

ranges?: boolean;

• Adds a ranges property to each node: [node.start, node.end]

property sourceFilename

sourceFilename?: string;

• Correlate output AST nodes with their source filename. Useful when generating code and source maps from the ASTs of multiple input files.

property sourceType

sourceType?: 'script' | 'module' | 'unambiguous';

• Indicate the mode the code should be parsed in. Can be one of "script", "module", or "unambiguous". Defaults to "script". "unambiguous" will make @babel/parser attempt to guess, based on the presence of ES6 import or export statements. Files with ES6 imports and exports are considered "module" and are otherwise "script".

property startColumn

startColumn?: number;

• By default, the parsed code is treated as if it starts from line 1, column 0. You can provide a column number to alternatively start with. Useful for integration with other source tools.

property startLine

startLine?: number;

• By default, the first line of code parsed is treated as line 1. You can provide a line number to alternatively start with. Useful for integration with other source tools.

property strictMode

strictMode?: boolean;

• Should the parser work in strict mode. Defaults to true if sourceType === 'module'. Otherwise, false.

property tokens

tokens?: boolean;

• Adds all parsed tokens to a tokens property on the File node.

property proposal

proposal: 'minimal' | 'fsharp' | 'hack' | 'smart';

property topicToken

topicToken?: '%' | '#' | '@@' | '^^' | '^';

property syntaxType

syntaxType: 'bar' | 'hash';

property disallowAmbiguousJSXLike

disallowAmbiguousJSXLike?: boolean;

property dts

dts?: boolean;