Find on Page - Bookmarklet

Published in: Javascript

This JavaScript bookmarklet will perform case-sensitive search in Google Chrome or any other browser include mobile Safari.

/* Bookmarklet Case-Sensitive Search */

function () {

    /* Prompt the user for search terms */
    var text = prompt("Search for:", "");
    if (text == null || text.length == 0) return;

    /* If there any previously highlighed words,
    remove them by setting the background to transparent */

    var spans = document.getElementsByClassName("labnol");

    if (spans) {
        for (var i = 0; i < spans.length; i++) {
            spans[i].style.backgroundColor = "transparent";

    /* Search Code is courtesy Jesse Ruderman */
    function searchWithinNode(node, te, len) {
        var pos, skip, spannode, middlebit, endbit, middleclone;
        skip = 0;
        if (node.nodeType == 3) {
            pos =;
            if (pos >= 0) {
                spannode = document.createElement("span");
                spannode.setAttribute("class", "labnol");
       = "yellow";
                middlebit = node.splitText(pos);
                endbit = middlebit.splitText(len);
                middleclone = middlebit.cloneNode(true);
                middlebit.parentNode.replaceChild(spannode, middlebit);
                skip = 1;
        } else if (node.nodeType == 1 && node.childNodes && node.tagName.toUpperCase() != "SCRIPT" && node.tagName.toUpperCase != "STYLE") {
            for (var child = 0; child < node.childNodes.length; ++child) {
                child = child + searchWithinNode(node.childNodes[child], te, len);
        return skip;
    searchWithinNode(document.body, text, text.length);
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Published in: Javascript

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Web Geek, Google Developer Expert
Amit Agarwal

Amit Agarwal is a Google Developer Expert in Google Workspace and Google Apps Script. He holds an engineering degree in Computer Science (I.I.T.) and is the first professional blogger in India. He is the developer of Mail Merge for Gmail and Document Studio. Read more on Lifehacker and YourStory

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