Javascript替换函数说明

Question

I am trying to learn javascript i have this code:

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

can i have a description about /^\\s+|\\s+$/g,""

searching to replace what with what ?

Regards

Answer 1

This is a regular expression . Basically \\s matches whitespac characters and replaces them with "" .

edit: / ... / marks the regex.

^\\s+ Take 1or more whitespaces at the beginning of the string.

\\s+$ Take 1 or more whitespaces at the end of the string.

/g Dont stop at the first match, but find all matches - "global flag"

Answer 2

It's removing whitespaces, either at the beginning or the end of the string, by replacing them with the empty string "" .

You can find more about regular expressions here http://www.w3schools.com/jsref/jsref_obj_regexp.asp .

Answer 3

首先，看看这个： http ： //www.w3schools.com/jsref/jsref_replace.asp然后不要使用stackoverflow来解决这类问题