我试图用多个其他单词替换字符串中的多个单词。字符串是“我有一只猫,一只狗和一只山羊。”

然而,这并不会产生“我有一只狗、一只山羊和一只猫”,而是产生“我有一只猫、一只猫和一只猫”。是否有可能在JavaScript中同时用多个其他字符串替换多个字符串,以便产生正确的结果?

var str = "I have a cat, a dog, and a goat.";
str = str.replace(/cat/gi, "dog");
str = str.replace(/dog/gi, "goat");
str = str.replace(/goat/gi, "cat");

//this produces "I have a cat, a cat, and a cat"
//but I wanted to produce the string "I have a dog, a goat, and a cat".

当前回答

const str = '感谢为Stack Overflow贡献一个答案!' Const substr = ['for', 'to'] 函数boldString(str, substr) { 让boldStr boldStr = str 字符串的子串。映射(e => { const strRegExp = new RegExp(e, 'g'); boldStr = boldStr。替换(strRegExp ' <强> $ {e} < / >强'); } ) 返回boldStr }

其他回答

你可以试试这个。买不聪明。

var str = "我有一只猫,一只狗,和一只山羊。"; console.log (str); str = str.replace(/cat/gi, "XXX"); console.log (str); STR = STR .replace(/goat/gi, "cat"); console.log (str); STR = STR .replace(/dog/gi, "goat"); console.log (str); str = str.replace(/XXX/gi, "dog"); console.log (str); 把: 我有一只狗,一只山羊和一只猫。

为此,您可以使用https://www.npmjs.com/package/union-replacer。它基本上是一个字符串。Replace (regexp,…)对等体,它允许在一次传递中发生多次替换,同时保留string.replace(…)的全部功能。

披露:我是作者。开发这个库是为了支持更复杂的用户可配置替换,它解决了所有有问题的事情,比如捕获组、反向引用和回调函数替换。

上面的解决方案对于精确的字符串替换来说已经足够好了。

    var str = "I have a cat, a dog, and a goat.";

    str = str.replace(/goat/i, "cat");
    // now str = "I have a cat, a dog, and a cat."

    str = str.replace(/dog/i, "goat");
    // now str = "I have a cat, a goat, and a cat."

    str = str.replace(/cat/i, "dog");
    // now str = "I have a dog, a goat, and a cat."
<!DOCTYPE html>
<html>
<body>



<p id="demo">Mr Blue 
has a           blue house and a blue car.</p>

<button onclick="myFunction()">Try it</button>

<script>
function myFunction() {
    var str = document.getElementById("demo").innerHTML;
    var res = str.replace(/\n| |car/gi, function myFunction(x){

if(x=='\n'){return x='<br>';}
if(x==' '){return x='&nbsp';}
if(x=='car'){return x='BMW'}
else{return x;}//must need



});

    document.getElementById("demo").innerHTML = res;
}
</script>

</body>
</html>

使用我的replace-once包,您可以执行以下操作:

const replaceOnce = require('replace-once')

var str = 'I have a cat, a dog, and a goat.'
var find = ['cat', 'dog', 'goat']
var replace = ['dog', 'goat', 'cat']
replaceOnce(str, find, replace, 'gi')
//=> 'I have a dog, a goat, and a cat.'