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What is the purpose of the property PerformanceTiming fetchStart

This question belongs to Javascript Invocation And Performance Navigation
Invocation and Performance Navigation
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What is the purpose of the property PerformanceTiming.fetchStart?

Answer & Solution
Correct Answer: Option B
The PerformanceTiming.fetchStart read-only property returns an unsigned long long representing the moment, in miliseconds since the UNIX epoch, the browser is ready to fetch the document using an HTTP request.
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