What does the `this` keyword refer to in a regular function called in the global scope (non-strict mode)? JavaScript AssociateEasy Try Now
What is the correct syntax for an arrow function that doubles a number? JavaScript AssociateEasy Try Now
What is the output of the following code? const handler = { set(target, prop, value) { if (typeof value !== ‘number’) throw new TypeError(‘Numbers only’); return Reflect.set(target, prop, value); } }; const numObj = new Proxy({}, handler); numObj.a = 5; numObj.b = ‘hi’; console.log(numObj.a); JavaScript ProfessionalHard Try Now
What is the purpose of the Error.cause property introduced in ES2022? JavaScript ProfessionalHard Try Now
What does the following code output? const a = { x: 1 }; const b = Object.create(a); b.y = 2; console.log(Object.keys(b), Object.getOwnPropertyNames(b), ‘x’ in b); JavaScript ProfessionalHard Try Now
What is the key behavioral difference between a regular function and an async function when they throw synchronously inside their body? JavaScript ProfessionalHard Try Now
What is the output of the following code? const map = new Map([[1, ‘a’], [2, ‘b’], [3, ‘c’]]); const obj = Object.fromEntries(map); console.log(typeof Object.keys(obj)[0], Object.keys(obj)[0]); JavaScript ProfessionalHard Try Now
