JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content" style="display:none">Content1 goes here</div>
<div class="content" style="display:none">Content1 goes here too</div>
<div class="content" style="display:none">Content1 goes here again</div>
<div class="content" style="display:none">extra node</div>

<div id="results"></div>

JavaScript

var filterarray = ["Content1", "goes"];
$(function(){
    totalSum = 0;
    var divs = [];
    for (i=0;i<filterarray.length;i++){ 
        $( "div.content:contains('"+ filterarray[i] +"')").css( "display", "block" );
        $.merge(divs, $( "div.content:contains('"+ filterarray[i] +"')"));
    }
    totalSum = $.unique(divs).length;
    $("#results").append("Total Results: " +totalSum);
});