CertainPerformance

CertainPerformance has asked 3 questions and find answers to 1079 problems.

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CertainPerformance questions

How to avoid accidentally implicitly referring to properties on the global object?
Why are await and async valid variable names?

CertainPerformance answers

Run my JavaScript code on every page on my browser, similar to how a Chrome extension would
node 8.6 javascript promises: UnhandledPromiseRejectionWarning
What is this syntax isNaN(+str!)
Closures VS Classes in modern Javascript
Create a common function to use same for other data
find an object by key values 2 levels deep
JavaScript wait for backend response while iterating array
Global Symbol Registry and cross realm symbols
Check if this array includes any name that has "John" inside of it
Javascript function transfomr my value in undefined. Me and my teacher does'nt understand why