Trivia questions and answers, drawn fresh from the well

• Intermediate Intermediate difficulty.
• Javascript

Which method flattens nested arrays to a specified depth?

Answer

flat()

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• Intermediate Intermediate difficulty.
• Javascript

Which loop iterates over iterable objects like arrays?

Answer

for...of

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• Intermediate Intermediate difficulty.
• Javascript

What is the server-side JavaScript runtime built on V8?

Answer

Node.js

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• Easy Easy difficulty.
• Javascript

Which operator assigns a value to a variable?

Answer

=

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• Easy Easy difficulty.
• Javascript

Which built-in object handles dates and times?

Answer

Date

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• Easy Easy difficulty.
• Javascript

Which event is fired when a user clicks an HTML element?

Answer

click

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• Easy Easy difficulty.
• Javascript

Which method joins all array elements into a string?

Answer

join()

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• Easy Easy difficulty.
• Javascript

Which method removes the last element from an array?

Answer

pop()

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• Hard Hard difficulty.
• Javascript

What symbol is used to declare private fields in JavaScript classes?

Answer

#

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• Hard Hard difficulty.
• Javascript

In ES2020, what operator is denoted by ?? and handles null/undefined?

Answer

nullish coalescing operator

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• Hard Hard difficulty.
• Javascript

What is the JavaScript engine used in Firefox?

Answer

SpiderMonkey

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• Intermediate Intermediate difficulty.
• Javascript

Which browser storage API allows key-value pairs that persist?

Answer

localStorage

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