what would be the preferred way to develop test automation framwork

I have a requirement to develop a test automation framework for a JAVA EE/Spring legacy web application .So this application has lot of screens and configurations .and also there are some screen which are not compatible with HTML 5.So I am in the R & D with mocha(https://mochajs.org/) and chai. 1.So will those frameworks support to implement these requirements ? 2.If not what would be the best way to implement these requirements ?