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isWhitespace(String): Boolean

Checks if the text contains only whitespace.

Introduced in DataWeave 2.2.0. Supported by Mule 4.2 and later.


Name Description


The input string.


This example shows how isWhitespace behaves with different inputs and sizes.


%dw 2.0
import isWhitespace from dw::core::Strings
output application/json
  "a": isWhitespace(null),
  "b": isWhitespace(""),
  "c": isWhitespace("  "),
  "d": isWhitespace("abc"),
  "e": isWhitespace("ab2c"),
  "f": isWhitespace("ab-c")


  "a": false,
  "b": true,
  "c": true,
  "d": false,
  "e": false,
  "f": false

isWhitespace(Null): Boolean

Helper function for isWhitespace so it works with null value.

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