如何从字符串中删除最后和第一个空格？

Question

  

可能重复：
  How do I trim a string in javascript?

我只需要从通用字符串中删除最后一个和第一个空格。

示例：

var str = " hello world "; // become "hello world"
var str = "ehi, do you come from ? "; // become "ehi, do you come from ?"
var str = "I am from Cina"; // remain "I am from Cina"

我该怎么做？

Answer 1

trim from jQuery正是您要找的。

$.trim(' string with spaces at the ends ');

或普通的javascript：

' string with spaces at the ends '.trim()