Object.keys(x)

What's visible in the console after running code: var a = 'Bolt' function f() { if (!a) { var a = 'Nut' } console.log(a); } f(); console.log(a);

var a = isNaN(null); is a true or false?

Evaluate: new Boolean(new Boolean(false)).valueOf()

Consider: var x = ['a', 'b', 'c']; Which line of code will remove the first element of the array, resulting in x being equal to ['b', 'c']?

console.log( typeof [1,2] ) will print out:

Which Popup Boxes have support in JavaScript?

Which is used in JavaScript to insert special characters?

How do you create a Date object in JavaScript?

Select all correct statements about Object.prototype

Is it possible using JavaScript, without 3rd party libraries, to select DOM elements with such selector: #question > option