JSFiddle - React, Tailwind, and code Playground

HTML

<noscript>Javascript is disabled</noscript>

JavaScript

var checkfor = {
    'Shockwave Flash' : false,
    'Adobe Acrobat'   : false
};

[].slice.call(navigator.plugins).forEach(function(x) {
    if (x.name in checkfor) checkfor[x.name] = true;
});


var p = document.createElement('p');
p.innerHTML = 'JavaScript is enabled';
document.body.appendChild(p);

for (var key in checkfor) {
    if ( checkfor[key] ) {
        var p = document.createElement('p');
        p.innerHTML = key + ' is installed';
        document.body.appendChild(p);
    }
}