What does /i at the end of a regex mean?

问题

What is the meaning of /i at the tail of this regex?

var time = /^([1-9]|1[0-9]):([0-5][0-9])(\s[a|p]m)$/i;

回答1:

/i stands for ignore case in the given string. Usually referred to as case-insensitive as pointed out in the comment.

回答2:

It's, like Sachin Shanbhag already answered the 'ignore case' modifier. So /[a-z]/i is equal to /[a-zA-Z]/. Check this link for other modifiers.

来源：https://stackoverflow.com/questions/4967369/what-does-i-at-the-end-of-a-regex-mean