Why do i need to add /g when using string replace in Javascript?

Question

Why is the \'/g\' required when using string replace in JavaScript?

e.g. var myString = myString.replace(/%0D%0A/g,\"
\");

Answer 1

The 'g' flag means "global" so each occurrence of %0D%0A will be replaced. Otherwise it would replace the FIRST occurrence only.