String values have a "length" property. Why is this property not included in a for-in loop over a string object? var prop, str; str = 'example'; /* str.length === 7 */ for ( prop in str) {}

What is the value of mike after this code is run? function Person(name, age) { this.name = name; this.age = parseInt(age, 10); } var mike = Person('Mike', '25');

Correct syntax for creating a Date object for January 10, 1998?

Consider the following variable assignments: var a = 1; var b = 2; var c = 3; var r = a & b & c; The value of r is:

What does the following return? Math.max();

What's the output? var test = function (firstName, surname) { this.Name.FirstName = firstName; this.Name.Surname = surname; } test.prototype = { Name: { FirstName: undefined, Surname: undefined } } var b = new test('john', 'doe'); var c = new test('bob', 'templeton'); console.log(b.Name.FirstName + ' ' + b.Name.Surname + ', ' + c.Name.FirstName + ' ' + c.Name.Surname);

Value of s.size after executing this code? let s = new Set(); s.add('aa').add('bb').add('cc').add('aa').add('bb')

What is true about JavaScript language?

What does let mean in JavaScript?

How many yield keywords can be used in function* functions?

What is the Promise?