Options

Usage

babel.transform(code, options);

$ babel --name=value

Option	Default	Description
`filename`	`"unknown"`	Filename for use in errors etc.
`filenameRelative`	`(filename)`	Filename relative to `sourceRoot`.
`blacklist`	`[]`	Array of transformers to exclude. Run `babel --help` to see a full list of transformers.
`whitelist`	`[]`	Array of transformers to only use. Run `babel --help` to see a full list of transformers.
`loose`	`[]`	Array of transformers to enable loose mode on.
`optional`	`[]`	Array of transformers to optionally use. Run `babel --help` to see a full list of transformers. Optional transformers displayed inside square brackets.
`modules`	`"common"`	Which module formatter to use. Run `babel --help` to see a full list of module formatters.
`sourceMap`	`false`	If truthy, adds a `map` property to returned output. If set to `"inline"`, a comment with a sourceMappingURL directive is added to the bottom of the returned code.
`sourceMapName`	`(filenameRelative)`	Set `file` on returned source map.
`sourceFileName`	`(filenameRelative)`	Set `sources[0]` on returned source map.
`sourceRoot`	`(moduleRoot)`	The root from which all sources are relative.
`moduleRoot`	`(sourceRoot)`	Optional prefix for the AMD module formatter that will be prepend to the filename on module definitions.
`moduleIds`	`false`	If truthy, insert an explicit id for modules. By default, all modules are anonymous. (Not available for `common` modules)
`comments`	`true`	Output comments in generated output.
`keepModuleIdExtensions`	`false`	Keep extensions in module ids
`externalHelpers`	`false`	Uses a reference to `babelHelpers` instead of placing helpers at the top of your code. Meant to be used in conjunction with external helpers.
`code`	`true`	Enable code generation
`ast`	`true`	Include the ÅST in the returned object
`format`	(See Formatting Options)	Formatting options for code generation
`playground`	`false`	Enable playground support.
`experimental`	`false`	Enable support for experimental ES7 features.

Formatting Options

Usage

babel.transform(code, { format: formattingOptions });

Option	Default	Description
`parentheses`	`true`	Preserve parentheses in new expressions that have no arguments
`comments`	`true`	Output comments in generated output
`compact`	`false`	Do not include superfluous whitespace characters and line terminators
`indent`	`{...}`	Indent options
`indent.adjustMultilineComment`	`true`	Adjust the indentation of multiline comments to keep asterisks vertically aligned
`indent.style`	`' '`	Indent string
`indent.base`	`0`	Base indent level