Topic: JavaScript – Page 21

I learned about an edge case in 'Array.prototype.indexOf' which is fixed in 'Array.prototype.includes'

I learned how to compare strings in a sane manner using 'String.prototype.localCompare'.

I learned that the IntersectionObserver constructor allows more than one threshold value.

I learned how the Unicode mode in JavaScript regular expression helps you counting code points.

I learned that not every property key that looks the same is the same.