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Price Converter with Tax for Specific Websites

Convert price tags on websites

目前為 2023-05-18 提交的版本，檢視 最新版本。

// ==UserScript==
// @name         Price Converter with Tax for Specific Websites
// @namespace    http://tampermonkey.net/
// @version      0.5
// @description  Convert price tags on websites
// @author       Nears
// @match        *://*.newegg.ca/*
// @match        *://*.canadacomputers.com/*
// @grant        none
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    // Define the tax rate
    const TAX_RATE = 0.14975;

    // Add CSS block
    const css = `
        .tax-included {
            color: red;
            font-size: 0.8em;
        }
        .base-price {
            color: #666;
            font-size: 0.8em;
            text-decoration: line-through;
        }
    `;
    const styleElement = document.createElement('style');
    styleElement.textContent = css;
    document.head.appendChild(styleElement);

    // Define the websites and their price tag selectors
    const websites = [
        {
            domain: 'newegg.ca',
            selectors: ['li.price-current', '.goods-price-current'],
            updatePrice: (element) => {
                const strongElement = element.querySelector('strong');
                const supElement = element.querySelector('sup');
                if (strongElement && supElement) {
                    const price = parseFloat(`${strongElement.textContent.replace(',', '')}${supElement.textContent}`);
                    const convertedPrice = convertPrice(price);
                    element.innerHTML = `<div class="tax-included">$${convertedPrice}</div><div class="base-price">Base price: $${price.toFixed(2)}</div>`;
                }
            }
        },
        {
            domain: 'canadacomputers.com',
            selectors: [
                '.h2-big > strong:nth-child(1)',
                '.text-red d-block mb-0 pq-hdr-product_price line-height',
                '.d-block.mb-0.pq-hdr-product_price.line-height',
                '.text-danger h2 price',
            ],
            updatePrice: (element) => {
                const price = parseFloat(element.textContent.replace('$', '').replace(',', ''));
                const convertedPrice = convertPrice(price);
                element.outerHTML = `<div class="tax-included">$${convertedPrice}</div><div class="base-price">Base price: $${price.toFixed(2)}</div>`;
            }
        }
    ];

    // Function to convert the price with tax
    function convertPrice(price) {
        const priceWithTax = price * (1 + TAX_RATE);
        return priceWithTax.toFixed(2);
    }

    // Function to update price tags on the website
    function updatePriceTags(website) {
        website.selectors.forEach(selector => {
            const priceElements = document.querySelectorAll(selector);
            priceElements.forEach(element => {
                website.updatePrice(element);
            });
        });
    }

    // Get the current hostname
    const hostname = window.location.hostname;

    // Update price tags for the matching website
    websites.forEach(website => {
        if (hostname.includes(website.domain)) {
            updatePriceTags(website);
        }
    });
})();