%dw 2.0
output application/json
var someString = "something"
var nullString = null
---
{
// checking if the string is blank
"emptyString" : isBlank(""),
"stringWithSpaces" : isBlank(" "),
"textString" : isBlank(someString),
"somePayloadValue" : isBlank(payload.nonExistingValue),
"nullString" : isBlank(nullString),
// checking if the string is not blank
"notEmptyTextString" : not isBlank(" 1234"),
"notEmptyTextStringTwo" : ! isBlank("")
}
isBlank
DataWeave 2.2 is compatible and bundled with Mule 4.2. This version of Mule reached its End of Life on May 2, 2023, when Extended Support ended. 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. |
isBlank(String | Null): Boolean
Returns true
if the given string is empty (""
), completely composed of whitespaces, or null
. Otherwise, the function returns false
.
Example
This example indicates whether the given values are blank. It also uses the not
and !
operators to check that a value is not blank.
The !
operator is supported starting in Dataweave 2.2.0. Use !
only in Mule 4.2 and later versions.