Is the regular expression correct?

Question

JavaScript

Hey

// Регулярное выражение
/Invalid value. Expected: \d+\d, instead got: \d+\d.$/

// Строка
Invalid value. Expected: 12, instead got: 13.

Did I make it right? Everything is working. It is not clear why it does not work without the "$" sign (end of line)

Answer 1

/Invalid value\. Expected: \d+, instead got: \d+\./

dot must be escaped, otherwise it is interpreted as "any character".