点(.)可能不被认为是特殊的。我在Mozfet’s & Seagull的答案中添加了一个OR条件:

function isNumber (text) {
      reg = new RegExp('[0-9]+$');
      if(text) {
        return reg.test(text);
      }
      return false;
    }

function removeSpecial (text) {
  if(text) {
    var lower = text.toLowerCase();
    var upper = text.toUpperCase();
    var result = "";
    for(var i=0; i<lower.length; ++i) {
      if(isNumber(text[i]) || (lower[i] != upper[i]) || (lower[i].trim() === '') || (lower[i].trim() === '.')) {
        result += text[i];
      }
    }
    return result;
  }
  return '';
}

搜索所有不(单词字符||空格):

str.replace(/[^\w ]/, '')

我尝试了Seagul非常有创意的解决方案，但发现它也将数字视为特殊字符，这并不适合我的需求。以下是我对Seagul解决方案的(故障保险)调整……

//return true if char is a number
function isNumber (text) {
  if(text) {
    var reg = new RegExp('[0-9]+$');
    return reg.test(text);
  }
  return false;
}

function removeSpecial (text) {
  if(text) {
    var lower = text.toLowerCase();
    var upper = text.toUpperCase();
    var result = "";
    for(var i=0; i<lower.length; ++i) {
      if(isNumber(text[i]) || (lower[i] != upper[i]) || (lower[i].trim() === '')) {
        result += text[i];
      }
    }
    return result;
  }
  return '';
}

点(.)可能不被认为是特殊的。我在Mozfet’s & Seagull的答案中添加了一个OR条件:

function isNumber (text) {
      reg = new RegExp('[0-9]+$');
      if(text) {
        return reg.test(text);
      }
      return false;
    }

function removeSpecial (text) {
  if(text) {
    var lower = text.toLowerCase();
    var upper = text.toUpperCase();
    var result = "";
    for(var i=0; i<lower.length; ++i) {
      if(isNumber(text[i]) || (lower[i] != upper[i]) || (lower[i].trim() === '') || (lower[i].trim() === '.')) {
        result += text[i];
      }
    }
    return result;
  }
  return '';
}

const input = ' #if_1 $(PR_CONTRACT_END_DATE) == '23-09-2019' # Test27919<alerts@imimobile.com> #elseif_1 $(PR_CONTRACT_START_DATE) == '20-09-2019' # Sender539<rama.sns@gmail.com> #elseif_1 $(PR_ACCOUNT_ID) == '1234' # AdestraSID < hello@imimobile.co > # else_1 # Test27919 < alerts@imimobile.com > # endif_1 # '; const replaceString = input.split (' $ (') . join(“- >”).split (') ') . join(“< -”); console.log (replaceString.match (/(?<=->).*?(?=<-)/ g));

试着用这个

var result= stringToReplace.replace(/[^\w\s]/g, '')

[^]表示否定，\w表示[a-zA-Z0-9_]字字符，\s表示空格， /[]/g表示全局