<script>
//去掉全部空格
var str = " 546546 4564 46 46 88 88 ";
var str = str.replace(/s+/g,"");//生成新的字符串,并未对原字符串修改
console.log(str);
//去掉左空格
var str1 = " 546546 4564 46 46 88 88 ";
var str1 = str1.replace(/^s*/,"");
console.log(str1);
//去掉右空格
var str2 = " 546546 4564 46 46 88 88 ";
var str2 = str2.replace(/(s*$)/g,"");
console.log(str2);
//去掉左右空格
var str3 = " 546546 4564 46 46 88 88 ";
var str3 = str3.replace(/^s+|s+$/g,"");
console.log(str3)
</script>