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In ES2020, what operator is denoted by ?? and handles null/undefined?
Answer
nullish coalescing operator
Which browser storage API allows key-value pairs that persist?
Answer
localStorage
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Latest trivia questions
In ES2020, what operator is denoted by ?? and handles null/undefined?
Answer
nullish coalescing operator
What is the JavaScript engine used in Firefox?
Answer
SpiderMonkey
Which browser storage API allows key-value pairs that persist?
Answer
localStorage
What does [] + [] evaluate to in JavaScript?
Answer
empty string
Which array method adds an element to the beginning?
Answer
unshift()
What property holds the maximum safe integer in JavaScript?
Answer
Number.MAX_SAFE_INTEGER
Which method of a Promise handles rejection?
Answer
.catch()
What error type is thrown when accessing a property of undefined?
Answer
TypeError
What keyword is used to define a generator function in JavaScript?
Answer
function*
Which function converts a string to an integer in JavaScript?
Answer
parseInt()