dynamically-add-or-remove-form-input-fields-using-jquer

 https://bootstrapfriendly.com/blog/dynamically-add-or-remove-form-input-fields-using-jquery/

https://www.formget.com/how-to-dynamically-add-and-remove-form-fields-using-javascript/

http://demos.codexworld.com/add-remove-input-fields-dynamically-using-jquery/