Hi, Greetings!
I've checked the demo and can help you to convert the Yii website to JavaScript with some improvements. Could you please provide more detail about the existing website?
With over 10+ years of extensive experience in development with strong proficiency in PHP, Yii, Laravel, Codeigniter, JavaScript, Vue, Bootstrap, and MySQL. Also, have the ability to understand and enhance the existing features. I have done the same work for my past clients. Also, I have developed numerous websites using Yii and Vue.
I am confident that my skills and expertise make me the perfect fit for your project requirements. I will dedicate my full attention and resources to ensure your project's success independently.
Let's have a chat or call where I can showcase my past work in a better way.
Thank you.