DataWeave 2.2 is compatible and bundled with Mule 4.2. Standard Support for Mule 4.2 ended on May 2, 2021, and this version of Mule will reach its End of Life on May 2, 2023, when Extended Support ends.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

with(((V, U) -> R) -> X, (V, U) -> R): X

Helper function that specifies a replacement element. This function is used with replace, update or mask to perform data substitutions.


Name Description


The value to be replaced.


The replacement value for the input value.


This example replaces all numbers in a string with "x" characters. The replace function specifies the base string and a regex to select the characters to replace, and with provides the replacement string to use.


%dw 2.0
output application/json
{ "ssn" : "987-65-4321" replace /[0-9]/ with("x") }


{ "ssn": "xxx-xx-xxxx" }

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