字符串(String)去除空格
str = " hello python " // 去除左空格: str=str.replace( /^s*/, ''); // 去除右空格: str=str.replace(/(s*$)/g, ""); // 去除两头空格: str = str.replace(/^s+|s+$/g,""); // 去除所有空格: str = str.replace(/s+/g,"");
https://www.cnblogs.com/jun-qi/p/11057421.html