Canvas now eliminates the need to write explicit codes to fetch the value of dependent fields in forms. The values in the dependent fields will now be automatically populated based on the value changes in the independent fields.
For example, in the following screen shots of the Beneficiary Details app, the Branch Name field gets filtered depending on the Bank Name.
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This feature reduces precious coding time and makes form configuration easier!
For more information on this feature, refer the Auto-populating Dependent Fields' Values in Forms section in the Canvas Technology 18.1 - Expert Studio Dev Guide.