Compute real return instead of IRR on Vanguard UK's investment dashboard.

vanguard-real-return.js

// ==UserScript==
// @name         Vangugard Real Return
// @namespace    https://sayan.page/
// @version      2024-05-10
// @description  Vangugard show real return instead of IRR.
// @author       say4n
// @match        https://secure.vanguardinvestor.co.uk/en-gb/customer/home/*/investments/personals*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=www.vanguardinvestor.co.uk
// @run-at document-idle
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const intervalId = setInterval(() => {
        let stats = [...document.querySelectorAll(".stat-row")];

        if (stats.length > 1) {
            let startedWith = parseFloat(stats.filter(it => it.innerText.includes("You started with"))[0].getElementsByClassName("figure")[0].innerText.replace("£", "").replace(",", ""));
            let contributedAndWithdrew = parseFloat(stats.filter(it => it.innerText.includes("You contributed and withdrew"))[0].getElementsByClassName("figure")[0].innerText.replace("£", "").replace(",", ""));
            let returnFromInvestment = parseFloat(stats.filter(it => it.innerText.includes("Your investments returned you"))[0].getElementsByClassName("figure")[0].innerText.replace("£", "").replace(",", ""));

            console.log(startedWith, contributedAndWithdrew, returnFromInvestment);

            const profitPercent = (returnFromInvestment * 100) / (contributedAndWithdrew + startedWith);

            console.log("profitPercent", profitPercent);

            const currentText = document.querySelector(".stat-return > .figure").innerText;
            document.querySelector(".stat-return > .figure").innerText = currentText + ` (${profitPercent.toFixed(2)}%)`;

            currentText && clearInterval(intervalId);
        }
    }, 500);
})();