js实现字符串翻转的2种方式

1.字符串的完全翻转:

var str = "smile at life";
document.write(str.split("").reverse().join("")); //结果为efil ta elims

2.翻转字符串中单词顺序,但单词字母顺序不变:

function reverseStr(param){

var arr = param.split(" ");

var newArr = [];

for(i=0;i

newArr[arr.length-i] = arr[i];

}

return newArr.join(" ");

}
document.write(reverseStr("smile at life")); //life at smile