这个解决方案结合了一些以前的答案,并更好地符合建议的2020年8月标准解决方案,这个解决方案在2020年9月对我来说仍然可行,因为String.replaceAll不在我使用的Node.js二进制中。

RegExp.escape 是一个单独的问题处理,但它在这里很重要,因为官方提出的解决方案将自动逃脱基于链条的查找输入。

如果你需要准确的标准符合,对于一个应用程序,它是严格依赖于标准实施,那么我建议使用Babel或其他工具,你得到“正确的答案”每次而不是Stack Overflow。

代码:

if (!Object.prototype.hasOwnProperty.call(RegExp, 'escape')) {
  RegExp.escape = function(string) {
    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#Escaping
    // https://github.com/benjamingr/RegExp.escape/issues/37
    return string.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
  };
}

if (!Object.prototype.hasOwnProperty.call(String, 'replaceAll')) {
  String.prototype.replaceAll = function(find, replace) {
    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replaceAll
    // If you pass a RegExp to 'find', you _MUST_ include 'g' as a flag.
    // TypeError: "replaceAll must be called with a global RegExp" not included, will silently cause significant errors. _MUST_ include 'g' as a flag for RegExp.
    // String parameters to 'find' do not require special handling.
    // Does not conform to "special replacement patterns" when "Specifying a string as a parameter" for replace
    // Does not conform to "Specifying a function as a parameter" for replace
    return this.replace(
          Object.prototype.toString.call(find) == '[object RegExp]' ?
            find :
            new RegExp(RegExp.escape(find), 'g'),
          replace
        );
  }
}

编码,小型:

Object.prototype.hasOwnProperty.call(RegExp,"escape")||(RegExp.escape=function(e){return e.replace(/[.*+\-?^${}()|[\]\\]/g,"\\$&")}),Object.prototype.hasOwnProperty.call(String,"replaceAll")||(String.prototype.replaceAll=function(e,t){return this.replace("[object RegExp]"==Object.prototype.toString.call(e)?e:new RegExp(RegExp.escape(e),"g"),t)});

例子:

console.log(
  't*.STVAL'
    .replaceAll(
      new RegExp(RegExp.escape('T*.ST'), 'ig'),
      'TEST'
    )
);

console.log(
  't*.STVAL'
    .replaceAll(
      't*.ST',
      'TEST'
    );
);

没有 RegExp.Escape 的代码:

if (!Object.prototype.hasOwnProperty.call(String, 'replaceAll')) {
  String.prototype.replaceAll = function(find, replace) {
    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replaceAll
    // If you pass a RegExp to 'find', you _MUST_ include 'g' as a flag.
    // TypeError: "replaceAll must be called with a global RegExp" not included, will silently cause significant errors. _MUST_ include 'g' as a flag for RegExp.
    // String parameters to 'find' do not require special handling.
    // Does not conform to "special replacement patterns" when "Specifying a string as a parameter" for replace
    // Does not conform to "Specifying a function as a parameter" for replace
    return this.replace(
          Object.prototype.toString.call(find) == '[object RegExp]' ?
            find :
            new RegExp(find.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&'), 'g'),
          replace
        );
  }
}

代码没有 RegExp.Escape,小型:

Object.prototype.hasOwnProperty.call(String,"replaceAll")||(String.prototype.replaceAll=function(e,t){return this.replace("[object RegExp]"==Object.prototype.toString.call(e)?e:new RegExp(e.replace(/[.*+\-?^${}()|[\]\\]/g,"\\$&"),"g"),t)});

下面是工作代码与原型:

String.prototype.replaceAll = function(find, replace) {
    var str = this;
    return str.replace(new RegExp(find.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1"), 'g'), replace);
};

2020年8月

不再有常见的表达式

const str = “测试 abc 测试 abc 测试 abc 测试 abc”; const modifiedStr = str.replaceAll('abc', ''); console.log(modifiedStr);

https://developer.mozilla.org/en-US/docs/Web/JavaScript/参考/Global_Objects/String/replaceAll

function replaceAll(str, find, replace) {
  var i = str.indexOf(find);
  if (i > -1){
    str = str.replace(find, replace); 
    i = i + replace.length;
    var st2 = str.substring(i);
    if(st2.indexOf(find) > -1){
      str = str.substring(0,i) + replaceAll(st2, find, replace);
    }       
  }
  return str;
}

截至 2020 年 8 月:现代浏览器支持由 ECMAScript 2021 语言规格定义的 String.replaceAll() 方法。

对于老/古老的浏览器:

function escapeRegExp(string) {
  return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
}

function replaceAll(str, find, replace) {
  return str.replace(new RegExp(escapeRegExp(find), 'g'), replace);
}

这就是这个答案的进化方式:

str = str.replace(/abc/g, '');

回复评论“如果“ABC”被转换为变量,会发生什么?”:

var find = 'abc';
var re = new RegExp(find, 'g');

str = str.replace(re, '');

作为回应 Click Upvote 的评论,您可以更简化:

function replaceAll(str, find, replace) {
  return str.replace(new RegExp(find, 'g'), replace);
}

注意: 常规表达式包含特殊(meta)字符,因此,它是危险的盲目通过一个论点在上面的查找函数,而不提前处理它逃避这些字符。

function escapeRegExp(string) {
  return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
}

因此,为了使上面的替代All() 函数更安全,如果您还包含 EscapeRegExp:

function replaceAll(str, find, replace) {
  return str.replace(new RegExp(escapeRegExp(find), 'g'), replace);
}

function replaceAll(str, find, replace) {
    var $r="";
    while($r!=str){ 
        $r = str;
        str = str.replace(find, replace);
    }
    return str;
}