Change field length

Frappe Framework Customization
1

Hi All,
How to change field length in dialogue by code ???

2

what do you want to change? go to customize form and check field type

3

No, I want to add js code @LifeP

4

in customize form you can select the field and change type from data to other types which will change the form view also by default.

5

one field have alot of cases (if statement), I want to set length of field in many cases @LifeP

I want to change the field length property by coding not from customize form