This section of the documentation will guide you how to apply different form styles for your need, There 3 different new styles that you can use, Please follow the steps in achieving this. There is no need of external JS or CSS libraries.
Creating a Standard Bootstrap Form
To create a native bootstrap form, the following tags are a must, It is the standard procedure in Bootstrap
You should have a form tag
A label for your input is conditional
Both label and input should be wrapped in form-group