Dropdown Validation in Javascript 2020 [with source code]

Dropdown Validation in Javascript

Tags:
dropdown validation javascript,

javascript validation for dropdownlist selection,

validate dropdown in javascript,

drop down list validation in javascript,

select option validation in javascript,

dynamic html,
dropdownbox,
states,
state,
nation,
countries,
country,
combobox,
selected,
nation selected,
how to add nations in dropdown,
how to add states in dropdown,
how to add cities in dropdown,
dynamically