javascritp widget to calculate trip duration

I am looking for a freelancer who can create a JavaScript widget that can calculate trip duration based on time. The widget should be universally compatible and able to be used on any platform or website.

Key Requirements:
- JavaScript development skills
- Experience with creating widgets
- Knowledge of trip duration calculations based on time

Additional Features:
- Real-time traffic updates

Ideal Skills and Experience:
- Proficiency in JavaScript
- Experience with creating universally compatible widgets
- Familiarity with trip duration calculations
- Knowledge of integrating real-time traffic updates into widgets