highlight.js

 let link_string = string;
    let searchList = search.split(" ");

    const highlightMatchesInString = (string, search)=>{
        var completedString = completedString || string;
        search.forEach(function(item) {
            var reg = "(" + item + ")(?![^<]*>|[^<>]*</)";
            var regex = new RegExp(reg, "i");

            //Highlight.....

            var matchStartPosition = string.match(regex).index;
            var matchEndPosition = matchStartPosition + item.length;
            var originalTextFoundByRegex = string.substring(matchStartPosition, matchEndPosition);
            completedString = completedString.replace(regex, `<strong>${originalTextFoundByRegex}</strong>`);
        });
        return completedString;
    }
    string = highlightMatchesInString(string, searchList);

    return `<li>
                <a href="/search?q=${link_string.replace(/ /g,"+")}">
                    <span>${string}</span>
                </a>
                <i class="ion-android-search"></i>
            </li>`