Class creation
is as simple as class XXX {}
let TestClass;
const instance = new TestClass();
assert.equal(typeof instance, 'object');
a class is block scoped
class Inside {}
{class Inside {}}
assert.equal(typeof Inside, 'undefined');
the constructor is a special method
class User {
constructor(id) {}
}
const user = new User(42);
assert.equal(user.id, 42);
defining a method by writing it inside the class body
class User {
}
const notATester = new User();
assert.equal(notATester.writesTests(), false);
multiple methods need no commas (opposed to object notation)
class User {
wroteATest() { this.everWroteATest = true; }
isLazy() { }
}
const tester = new User();
assert.equal(tester.isLazy(), true);
tester.wroteATest();
assert.equal(tester.isLazy(), false);
anonymous class
const classType = typeof {};
assert.equal(classType, 'function');