javascript - Does the $ symbol in the regular /[0-9]\s$/ mean it ends with a number and a space or a space?

Question

What is the matching range of

$?

Answer 1

No, $ matches the end of the string

Answer 2

$ 所匹配的是字符串的结尾，/s$/ Matches strings ending with the letter "s"

Answer 3

This regex matches strings ending with numbers + spaces