Target.js

// ==UserScript==
// @name         Target auto-pickup order
// @namespace    http://myles.empty.best/
// @version      0.1
// @description  GOGOGOGOGOGOGOGO
// @author       Myles "Empty" Best
// @require http://code.jquery.com/jquery-3.4.1.min.js
// @match        https://www.target.com/p/playstation-5-console/-/A-81114595
// @match        https://www.target.com/co-cart
// @match        https://www.target.com/co-review
// @grant        none
// ==/UserScript==

// Login,
// load https://www.target.com/p/playstation-5-console/-/A-81114595
// and wait

// for debug you can use
// @match        https://www.target.com/p/dualsense-wireless-controller-for-playstation-5/-/A-81114477

async function wait_for(query) {
    while(true) {
        var node = $(query);
        if(node.length != 0 && node.is(":visible")) {
            break;
        }
        console.log("" + query + " not available yet, waiting.");
        await new Promise(r => setTimeout(r, 500));
    }
}

async function press_button(query) {
    await wait_for(query);
    $(query).click();
    console.log("Button " + query + " pressed");
}

async function reload_later() {
    await new Promise(r => setTimeout(r, 8 * 1000));
    console.log("refresh");
    document.location.reload();
}

async function product_page() {
    await wait_for("[data-test=storeNameWithAddressPopover]");
    reload_later();
    var expect = 1;

    if($(".cartLinkQuantity").length) {
        expect = parseInt($(".cartLinkQuantity").innerText) + 1
    }

    await press_button("[data-test=orderPickupButton]");
    await wait_for(".cartLinkQuantity");
    // TODO check quantity
    console.log("Redirecting");
    document.location="https://www.target.com/co-cart";
}

function cart() {
  press_button("[data-test=checkout-button]");
}

function order() {
  press_button("[data-test=placeOrderButton]");
}

if(location.pathname == "/co-cart") {
    cart();
    order();
} else if(location.pathname == "/co-review") {
    order();
} else {
    product_page();
}