Trimming whitespace from the END of a string only, with jQuery

问题

I know of the jQuery $.trim() function, but what I need is a way to trim whitespace from the END of a string only, and NOT the beginning too.

So

  str ="     this is a string     ";

would become

  str ="     this is a string";

Any suggestions?

Thanks!

回答1:

You can use a regex:

str = str.replace(/\s*$/,"");

It says replace all whitespace at the end of the string with an empty string.

Breakdown:

• \s* : Any number of spaces
• $ : The end of the string

More on regular expressions:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions

回答2:

For some browsers you can use: str = str.trimRight(); or str = str.trimEnd();

If you want total browser coverage, use regex.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/trimEnd

来源：https://stackoverflow.com/questions/17938186/trimming-whitespace-from-the-end-of-a-string-only-with-jquery