issue with null values on string dataType

Hello, Serkan,
 
Thank you for writing to us.
 
We would like to explain that the format object defines the way how numeric values are formatted in the component. 
 
For customizing the way empty string values are shown on the grid, we kindly recommend using localization:

global: {
   localization: {
      grid: {
          blankMember: "test"
      }
   }
}

Here is a JSFiddle example for illustration: https://jsfiddle.net/flexmonster/f2ck46b1/
 
 
Please let us know if everything works fine for you.
 
Best regards,
Vera
 

Hello, Serkan,
 
Thank you for your response.
 
Our team will provide an update so that null and undefined values for fields of type string will be considered as blankMember. 
Then it will be possible to customize null value representation for string data types via localization as shown in the previous answer.
This will be available in the minor release version with the ETA 4th of May.
 
Meanwhile, as a workaround, we kindly recommend changing the displayed "null" values via the customizeCell() API call.
Here is a JSFiddle example for illustration: https://jsfiddle.net/flexmonster/h82gctv3/
 
Please let us know if this would work for you and if you have any additional questions.
 
Looking forward to your reply.
 
Kind regards,
Vera

Hello, Serkan, 
 
We are happy to inform you that now the nullValue format object property works for string data types also. 
Here is a JSFiddle example for illustration: https://jsfiddle.net/flexmonster/aLmhrxye/
 
This is provided in the 2.8.6 version of Flexmonster: https://www.flexmonster.com/release-notes/
You are welcome to update the component: https://www.flexmonster.com/doc/updating-to-the-latest-version/
 
Please let us know if everything works fine for you. 
Looking forward to your feedback. 
 
Kind regards, 
Vera