正则表达式替换器不起作用

Question

My problem is that I cannot get the code to remove mark tags around a word and keep the word there with the same capitalization. Here is my code:

function removeMark(tagName, Color) {
  var tagNameC = tagName.toUpperCase();
  var IndAry = tags.indexOf(tagNameC);
  tags.splice(IndAry, 1);
  var Notes = document.getElementById("NoteHolder").innerHTML;
  var MarkBack = new RegExp("/b" + tagName + "/b", "gim")
  var MarkBackTo = "<mark class=" + Color + ">" + MarkBack + "</mark>"
  var AfterRep = Notes.replace(MarkBackTo, "$1");
  document.getElementById("NoteHolder").innerHTML = AfterRep;
  var list = document.getElementById("myList");
  var idmarker = "MarkID" + tagName;
  var ElementID = document.getElementById(idmarker);
  MarkList.removeChild(ElementID);
}

tagName is the word inside the mark tags. The mark tags have a class that is a constant but the word inside may not always be due to capitalization. I am inputting tagName and Color through the input. I am guessing it has to do with the regex since I do not know much about it and I cannot find anything wrong with my javascript. If anyone can see what is going wrong it would be extremely helpful!

Answer 1

var input = '<mark class="color">coTNeNt</mark>'
var reg = /<([\w]+)[ \w=\"]+>([\w]+)<\/\1>/g
input.replace(reg, '$2')

Output: "coTNeNt"