JSFiddle - React, Tailwind, and code Playground
by tuga
JavaScript
var sentence = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, Lorem ipsum dolor sit amet, consectetur adipiscing elit, Lorem ipsum dolor sit amet, consectetur adipiscing elit";
var match = "dolor";
var replace= "<em>"+match+"</em>";
var regexp = new RegExp(match, "gi");
var output = sentence.replace(regexp, replace);
alert(output);