A bookmarklet to highlight common and proper nouns on a webpage

Highlight-Common-and-Proper-Nouns.md

1. Copy the code below:

javascript:(function(){
    var script = document.createElement('script');
    script.src = 'https://cdn.jsdelivr.net/npm/compromise@latest/builds/compromise.min.js';
    document.body.appendChild(script);

    script.onload = function() {
        var textNodes = document.evaluate('//body//text()', document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
        for (var i = 0; i < textNodes.snapshotLength; i++) {
            var node = textNodes.snapshotItem(i);
            var words = node.nodeValue.split(' ');
            for (var j = 0; j < words.length; j++) {
                var nlp_word = nlp(words[j]);
                if (nlp_word.topics().out("text") || nlp_word.match('#ProperNoun').out("text") || (nlp_word.nouns().out("text") && nlp_word.out("text").match(/^\p{Lu}[\p{Ll}'’]/u) && !nlp_word.pronouns().out("text")) ) {
                    var span = document.createElement("span");
                    span.style.color = "orange";
                    var textnode = document.createTextNode(words[j]);
                    span.appendChild(textnode);
                    node.parentNode.insertBefore(span, node);
                } else if (nlp_word.nouns().out("text") && !nlp_word.pronouns().out("text")) {
                    var span = document.createElement("span");
                    span.style.color = "red";
                    var textnode = document.createTextNode(words[j]);
                    span.appendChild(textnode);
                    node.parentNode.insertBefore(span, node);
                } else {
                    var textnode = document.createTextNode(words[j]);
                    node.parentNode.insertBefore(textnode, node);
                }
                if(j !== words.length -1){
                    var space = document.createTextNode(" ");
                    node.parentNode.insertBefore(space, node);
                }
            }
            node.parentNode.removeChild(node);
        }
    };
})();

2. Create a new bookmark.
3. Set the bookmarklet name and paste the above as the URL.