Home > Frontend Engineering and Javascript > Frontend Interview Guides > Javascript Interview Questions: Syntax and Features Show previous contentLet's test your knowledge. Fill in the missing part by typing it in.The follow code will output ___.JAVASCRIPT1var output = (function(x) { 2 delete x; 3 return x; 4})(1); 5 6console.log(output);Write the missing line below.SubmitReveal answer Show following content