Custom dependent picklist in lightning.

Hello Shradha,

Step  1 : Setup Picklist field dependency

Step  2 : Create apex controller

Step  3 : Create Lightning Component (component, controller & helper)

Hi,

This what I found online let me know if this is correct.

For example:
<lightning:recordEditForm recordId=""
                                          objectApiName="Case">
                     <lightning:inputField fieldName="Subject" />
                    <lightning:inputField fieldName="Type" />
                    <lightning:inputField fieldName="Case_Sub_Type__c" />
                   
                 </lightning:recordEditForm>

Hope this helps.