tamper_monkey_amazon_search_matches.js

// ==UserScript==
// @name         Amazon UK Search Highlighter
// @namespace    http://tampermonkey.net/
// @version      1.2
// @description  Highlights search terms in Amazon results
// @match        https://www.amazon.co.uk/s*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const urlParams = new URLSearchParams(window.location.search);
    const searchQuery = urlParams.get('k');
    
    if (!searchQuery) return;

    const searchWords = searchQuery.toLowerCase()
        .split(/\s+/)
        .filter(word => word.length > 2);

    if (searchWords.length === 0) return;

    const colours = ['#ff0', '#0f0', '#f0f', '#0ff', '#ffa500'];

    function highlightTextNodes(element) {
        const walker = document.createTreeWalker(
            element,
            NodeFilter.SHOW_TEXT,
            null,
            false
        );

        const textNodes = [];
        let node;
        while (node = walker.nextNode()) {
            textNodes.push(node);
        }

        textNodes.forEach(textNode => {
            let text = textNode.textContent;
            let replaced = false;

            searchWords.forEach((word, index) => {
                const regex = new RegExp(`(${word})`, 'gi');
                if (regex.test(text)) {
                    const colour = colours[index % colours.length];
                    text = text.replace(regex, 
                        `<mark style="background: ${colour}; color: #000; font-weight: bold; padding: 2px;">$1</mark>`
                    );
                    replaced = true;
                }
            });

            if (replaced) {
                const span = document.createElement('span');
                span.innerHTML = text;
                textNode.parentNode.replaceChild(span, textNode);
            }
        });
    }

    // Find all search result items
    const resultItems = document.querySelectorAll('[data-component-type="s-search-result"]');
    
    resultItems.forEach(result => {
        const resultText = result.textContent.toLowerCase();
        
        // Check if ALL search words are present
        const matchesAll = searchWords.every(word => resultText.includes(word));
        
        if (matchesAll) {
            result.style.border = '4px solid #00ff00';
            result.style.boxShadow = '0 0 10px #00ff00';
            result.style.backgroundColor = '#f0fff0';
        }
        
        highlightTextNodes(result);
    });
})();