Question 1
What will the following code output? console.log(typeof null)
What will the following code output? console.log(typeof null)
What is the output of: console.log([1, 2, 3].map(x => x * 2).filter(x => x > 3).reduce((a, b) => a + b, 0))
What does the 'this' keyword refer to inside a regular function declared with 'function' keyword in strict mode?
What is a closure in JavaScript?
What will this code output? let a = {}; let b = { key: 'b' }; let c = { key: 'c' }; a[b] = 123; a[c] = 456; console.log(a[b]);