Javascript String Compare == sometimes fails

Question

How could the following code sometimes evaluate to false?

(transport.responseText == \'1\' || 
 transport.responseText == \'CARD_VALID\')

M

Answer 1

I would advice you to use normalization preferably "NFKC" or "NFKD" as these seem to normalize non-breaking space into regular space.

So you can write your code as :-

string1.normalize("NFKC") === string2.normalize("NFKC")