isclass

const isClass = require('isclass');
 
console.log(isClass("hello world")); // > false
console.log(isClass(function() {})); // > false
console.log(isClass(async function() {})); // > false
console.log(isClass(class {})); // > true
console.log(isClass(() => {})); // > false
console.log(isClass(async () => {})); // > false
console.log(isClass(123)); // > false
console.log(isClass({})); // > false
console.log(isClass([])); // > false