尝试以下操作:

Try this:

var str = 'hi how are you';

var reversedStr = str.split("").reverse().join("");

我在Chrome JavaScript控制台中对此进行了测试.效果很好.

注意:如果是请告诉我紧急"这类问题，则可以用Google搜索"javascript反向字符串"并在10秒内找到答案.

I tested this in my Chrome JavaScript console. works fine.

Note: If it was ''please tell me urgent'' kind of question, you could have Googled ''javascript reverse string'' and found the answer within 10 seconds.