JSFiddle - React, Tailwind, and code Playground

by nate

HTML

<h1>HTML Ipsum Presents</h1>
           
<p><strong>Pellentesque habitant morbi tristique</strong> senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. <em>Aenean ultricies mi vitae est.</em> Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, <code>commodo vitae</code>, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum orci, sagittis tempus lacus enim ac dui. <a href="#">Donec non enim</a> in turpis pulvinar facilisis. Ut felis.</p>

<h2>Header Level 2</h2>
           
<ol>
   <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
   <li>Aliquam tincidunt mauris eu risus.</li>
</ol>

<blockquote><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est.</p></blockquote>

<h3>Header Level 3</h3>

<ul>
   <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
   <li>Aliquam tincidunt mauris eu risus.</li>
</ul>

JavaScript

var words = [];

var walkDOM = function (node, func) {
    func(node);
    node = node.firstChild;
    while(node) {
        walkDOM(node, func);
        node = node.nextSibling;
    }

};

walkDOM(document.body, function (node) {
    
    if (node.nodeName === '#text') {
        var text = node.textContent;
        
        text = text.replace(/[^A-Za-z]/g, ' ');
        
        text = text.split(' ');
        
        if (text.length) {

            for (var i = 0, length = text.length; i < length; i += 1) {
                var matched = false,
                    word = text[i];
                
                for (var j = 0, numberOfWords = words.length; j < numberOfWords; j += 1) {
                    if (words[j][0] === word) {
                        matched = true;
                        words[j][1] += 1;
                    }
                }
                
                if (!matched) {
                    words.push([word, 1]);
                }
                        
            }
        }
    }
});

var displayWordList = function (words) {
	// Sort words by number of occurrences
	words = words.sort((a, b) => b[1] - a[1]);
  
  for (var i = 0, length = words.length; i < length; i += 1) {
    console.log(words[i][0], words[i][1]);
  }
};

displayWordList(words);