String.prototype.reverse_string=function() {return this.split("").reverse().join("");}

or

String.prototype.reverse_string = function() {
    var s = "";
    var i = this.length;
    while (i>0) {
        s += this.substring(i-1,i);
        i--;
    }
    return s;
}

你可以尝试这样做。我相信还有重构的空间。我无法使用分裂函数。也许有人知道不分裂的方法。

代码设置，可以把它放在你的。js库

使用它的代码(有客户端代码，只是因为它在浏览器中测试过):

var sentence = "My Stack is Overflowing."
document.write(sentence.reverseLetters() + '<br />');
document.write(sentence.reverseWords() + '<br />');

代码片段:

String.prototype.aggregate = function(vals, aggregateFunction) { var temp = ''; for (var i = vals.length - 1; i >= 0; i--) { temp = aggregateFunction(vals[i], temp); } return temp; } String.prototype.reverseLetters = function() { return this.aggregate(this.split(''), function(current, word) { return word + current; }) } String.prototype.reverseWords = function() { return this.aggregate(this.split(' '), function(current, word) { return word + ' ' + current; }) } var sentence = "My Stack is Overflowing." document.write(sentence.reverseLetters() + '<br />'); document.write(sentence.reverseWords() + '<br />');

function reverseString(string) {
    var reversedString = "";
    var stringLength = string.length - 1;
    for (var i = stringLength; i >= 0; i--) {
        reversedString += string[i];
    }
    return reversedString;
}

var reverseString = function(str){ 
  let length = str.length - 1;
  str = str.split('');

  for(let i=0;i<= length;i++){
    str[length + i + 1] = str[length - i];
  }

  return str.splice(length + 1).join('');
}

我想，这对你有用

function reverse(str){
    str = str.split("").reverse().join("").split(" ").reverse().join(" ");
    console.log(str)
}

以下是可以用来实现字符串反转的四种最常用方法

给定一个字符串，返回一个新字符串 字符顺序

问题的多种解决方案

//reverse('apple') === 'leppa'
//reverse('hello') === 'olleh'
//reverse('Greetings!') === '!sgniteerG'

// 1. First method without using reverse function and negative for loop
function reverseFirst(str) {
    if(str !== '' || str !==undefined || str !== null) {
        const reversedStr = [];
        for(var i=str.length; i>-1; i--) {
        reversedStr.push(str[i]);
        }
    return reversedStr.join("").toString();
    }
}

// 2. Second method using the reverse function
function reverseSecond(str) {
    return str.split('').reverse().join('');
}

// 3. Third method using the positive for loop
function reverseThird(str){
    const reversedStr = [];
    for(i=0; i<str.length;i++) {
        reversedStr.push(str[str.length-1-i])
    }
    return reversedStr.join('').toString();
}

// 4. using the modified for loop ES6
function reverseForth(str) {
    const reversedStr = [];
    for(let character of str) {
        reversedStr = character + reversedStr;
    }
    return reversedStr;
}

// 5. Using Reduce function
function reverse(str) {
    return str.split('').reduce((reversed, character) => {
        return character + reversed;  
    }, '');
}