### 返回值:StringjQuery.trim(str)
### 概述
去掉字符串起始和结尾的空格。
### 参数
#### **str**String*V1.0*
需要处理的字符串
### 示例
#### 描述:
去掉字符串起始和结尾的空格。
##### jQuery 代码:
~~~
$.trim(" hello, how are you? ");
~~~
##### 结果:
~~~
"hello, how are you?"
~~~
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