class construct with ECMAScript 6 in 2015. All of today’s standard browsers support the
class construct, except for Microsoft Internet Explorer. With Microsoft’s phaseout of Internet Explorer, you should not count on IE ever supporting the
class construct. Microsoftophiles are in the process of migrating to Edge, but it’ll take a while to finish the transition. In the meantime, you should be familiar with legacy code techniques that implement the object-oriented paradigm without the
class construct. Legacy code is code that is used today even though it’s considered ...