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Options | Fast-CSV

All of the following options can be passed to any of the formatting methods.

Type: string Default: ','

Specify an alternate field delimiter such as ; or \t. Example

When specifying an alternate delimiter you may only pass in a single character delimiter

Type: string Default: '\n'

Specify an alternate row delimiter (i.e \r\n). Example

Type: string|boolean Default: '"'

If provided as a string it will be used to quote fields that contain a delimiter. Example

If set to true the default quote will be used.

This is the same as not providing the option

If set to false then quoting will be disabled

If your field could contain a delimiter then you may end up with extra columns

Type: string Default: '"'

The character to use when escaping a value that is quoted and contains a quote character that is not the end of the field. Example

i.e: First,"Name"' => '"First,""Name"""

Type: boolean Default: false

Set to true to include a row delimiter at the end of the csv.

Type: boolean Default: false

Set to true if you want the first character written to the stream to be a utf-8 BOM character.

Type: null|boolean|string[] Default: null

If true then the headers will be auto detected from the first row. Example

• If the row is a one-dimensional array then the headers will be the first row processed
• If the row is an object then the keys will be used.
• If the row is an array of two element arrays ([ ['header', 'column'], ['header2', 'column2'] ]) then the first element in each array will be used.

If there is not a headers row and you want to provide one then set to a string[]. Example

• If the row is an object the headers must match fields in the object, otherwise you will end up with empty fields
• If there are more headers than columns then additional empty columns will be added

Type: boolean Default: true

Set to false you dont want to write headers.

This option can be used to append to an existing csv.

• If the headers option is set to true and the writeHeaders option set to false then any auto discovered headers will not be written in the output. Example
• If headers is a string[] and writeHeaders is false then they will not be written. Example

Type: boolean Default: false

Set to true if you always want headers written, even if no rows are written.

This will throw an error if headers are not specified as an array.

Type: boolean|boolean[]|{[string]: boolean} Default: false

If true then columns and headers will be quoted (unless quoteHeaders is specified).

• Example
• Quote Columns NOT Headers Example

If it is an object then each key that has a true value will be quoted ((unless quoteHeaders is specified). Example

If it is an array then each item in the array that is true will have the column at the corresponding index quoted (unless quoteHeaders is specified). Example

If quoteHeaders is not specified this option will apply to both columns and headers.

Type: boolean|boolean[]|{[string]: boolean} Default: the quoteColumns value

If true then all headers will be quoted.

If it is an object then each key that has a true value will be quoted (see example below)

If it is an array then each item in the array that is true will have the header at the corresponding index quoted

Type: (row) => Row | (row, cb) => void Default: null

A function that accepts a row and returns a transformed one to be written, or your function can accept an optional callback to do async transformations.

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