JavaScript从字符串中删除尾随空格和句点

Question

I am attempting to remove all trailing white-space and periods from a string so that if I took either of the following examples:

var string = "  ..  bob is a string .";

or

var string = " .  bob is a string . ..";

They would end up as:

"bob is a string"

I know diddly squat about regex but I found a function to remove trailing white-space here :

str.replace(/^\s+|\s+$/g, "");

I tried modifying to include periods however it still only removes trailing white-space characters:

str.replace(/^[\s+\.]|[\s+\.]$/g, "");

Can anyone tell me how this is done and perhaps explain the regular expression used to me?

Answer 1

Your regex is almost right, you just need to put the quantifier ( + ) outside of the character class ( [] ):

var str = " .  bob is a string . ..";
str.replace(/^[.\s]+|[.\s]+$/g, "");
//"bob is a string"

Answer 2

Try this:

var str = " .  bob is a string . ..";
var stripped = str.replace(/^[\s.]+|[\s.]+$/g,"");

Within character classes ([]) the . need not be escaped. This will remove any leading or trailing whitespaces and periods.