JSFiddle - React, Tailwind, and code Playground

by Zevan

HTML

<span id="someText">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam. Quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Ut enim ad minim veniam. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Ut enim ad minim veniam no period</span>

JavaScript

var someText = $("#someText");
var text = someText.text();
text = text.replace(/\./g,"");

var words = text.split(" ");
var duplicates = [];
var space;

for (var i = 0; i < words.length; i++) {
    var word = words[i];
    var matchString = "";
    var matchNum = 0;
    for (var j = i + 1; j < words.length; j++) {
        var nextWord = words[j];
        if (word == nextWord) {
            while(words[i] == words[j] && j < words.length){
             space = "";
             if (matchNum > 0) space = " ";
             matchString += space+ words[i];
             i++;
             j++;
             matchNum++;
            }
            
            duplicates.push(matchString);
        }else if (matchNum > 1){
          console.log("break", word);
          break;   
        }
    }
}

duplicates = $.unique(duplicates);
// console.log(duplicates);

var pattern = new RegExp("\\b("+duplicates.join("|")+")\\b", "g")
text = someText.text().replace(pattern, "<b>$1</b>");
someText.html(text);