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n8n-docs/docs/code/builtin/data-transformation-functions/index.md
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title description contentType
Data transformation functions Introduction to data transformation functions for expressions. overview

Data transformation functions

Data transformation functions are helper functions to make data transformation easier in expressions.

!!! note "JavaScript in expressions" You can use any JavaScript in expressions. Refer to Expressions for more information.

For a list of available functions, refer to the page for your data type:

Usage

Data transformation functions are available in the expressions editor.

The syntax is:

{{ dataItem.function() }}

For example, to check if a string is an email:

{{ "example@example.com".isEmail() }}

// Returns true