In the Kreo HMI project tree the project scripts are grouped in three different tabs:
 
 
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Script. These scripts are running on the Edge side of the product. The script language is Structured Text (ST) following the IEC 61131-3 specification 
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Javascript. Scripts running on the client side. The script language is Javascript 
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External Javascript: Javascript not defined in KREO HMI but only loaded at the product startup.