Preview developer products on a ROBLOX game page (some may not be available for purchase in-game).
// ==UserScript==
// @name ROBLOX Developer Products Preview
// @namespace http://tampermonkey.net/
// @version 1337
// @description Preview developer products on a ROBLOX game page (some may not be available for purchase in-game).
// @author Andrew Oliver
// @match https://www.roblox.com/games/*
// @grant none
// @run-at document-idle
// ==/UserScript==
(function() {
'use strict';
let previewButtonAdded = false;
function getPlaceId(url) {
const match = url.match(/\/games\/(\d+)/);
return match ? match[1] : null;
}
async function init() {
const placeId = getPlaceId(window.location.href);
if (!placeId || previewButtonAdded) return;
previewButtonAdded = true;
async function getUniverseId(placeId) {
const url = `https://apis.roblox.com/universes/v1/places/${placeId}/universe`;
while (true) {
try {
const response = await fetch(url);
if (response.ok) {
const data = await response.json();
if (data.universeId) return data.universeId;
}
} catch (err) { console.error(err); }
await new Promise(r => setTimeout(r, 5000));
}
}
async function getDeveloperProducts(universeId) {
const url = `https://apis.roblox.com/developer-products/v2/universes/${universeId}/developerproducts?limit=100`;
while (true) {
try {
const response = await fetch(url);
if (response.ok) {
const data = await response.json();
const products = [];
if (data.developerProducts && data.developerProducts.length > 0) {
for (const p of data.developerProducts) {
products.push({
DisplayName: p.displayName || p.Name,
PriceInRobux: p.PriceInRobux,
DeveloperProductId: p.DeveloperProductId
});
}
}
return products;
}
} catch (err) { console.error(err); }
await new Promise(r => setTimeout(r, 5000));
}
}
async function getDeveloperProductImages(productIds) {
if (productIds.length === 0) return {};
const url = `https://thumbnails.roblox.com/v1/developer-products/icons?developerProductIds=${productIds.join(",")}&size=150x150&format=png&isCircular=false`;
while (true) {
try {
const response = await fetch(url);
if (response.ok) {
const data = await response.json();
const images = {};
(data.data || []).forEach(item => images[item.targetId] = item.imageUrl);
return images;
}
} catch (err) { console.error(err); }
await new Promise(r => setTimeout(r, 5000));
}
}
let previewVisible = false;
let previewContainer = null;
let dataLoaded = false;
let cachedProducts = [];
let cachedGameUrl = "";
const previewButton = document.createElement('button');
previewButton.textContent = 'Preview Products';
previewButton.style.position = 'fixed';
previewButton.style.bottom = '30px';
previewButton.style.right = '30px';
previewButton.style.padding = '12px 22px';
previewButton.style.fontSize = '16px';
previewButton.style.background = '#28a745';
previewButton.style.color = '#fff';
previewButton.style.border = 'none';
previewButton.style.borderRadius = '8px';
previewButton.style.cursor = 'pointer';
previewButton.style.zIndex = '99999';
previewButton.style.fontWeight = "600";
document.body.appendChild(previewButton);
previewButton.addEventListener('click', async function handlePreviewClick() {
if (!dataLoaded) {
previewButton.disabled = true;
const originalText = previewButton.textContent;
previewButton.textContent = 'Loading...';
try {
const gameUrl = window.location.href;
const universeId = await getUniverseId(placeId);
let productsList = await getDeveloperProducts(universeId);
const productIds = productsList.map(p => p.DeveloperProductId);
const imagesMap = await getDeveloperProductImages(productIds);
const placeholderImage = "https://tr.rbxcdn.com/180DAY-155b79f176f56ede3583d6c4bd4eefff/150/150/Hat/Webp/noFilter";
productsList.forEach(p => {
p.ImageUrl = imagesMap[p.DeveloperProductId] || placeholderImage;
});
cachedProducts = productsList;
cachedGameUrl = gameUrl;
buildPreviewDOM(cachedProducts, cachedGameUrl);
dataLoaded = true;
previewContainer.style.display = 'block';
previewVisible = true;
} finally {
previewButton.textContent = originalText;
previewButton.disabled = false;
}
return;
}
if (previewContainer) {
previewContainer.style.display = previewVisible ? 'none' : 'block';
previewVisible = !previewVisible;
}
});
function buildPreviewDOM(productsList, gameUrl) {
const bodyClass = document.body.className;
previewContainer = document.createElement('div');
previewContainer.id = 'preview-products-container';
previewContainer.style.position = 'fixed';
previewContainer.style.top = '50%';
previewContainer.style.left = '50%';
previewContainer.style.transform = 'translate(-50%, -50%)';
previewContainer.style.padding = '20px';
previewContainer.style.borderRadius = '10px';
previewContainer.style.zIndex = '100000';
previewContainer.style.maxHeight = '80vh';
previewContainer.style.width = '100%';
previewContainer.style.maxWidth = '1200px';
previewContainer.style.overflowY = 'auto';
previewContainer.style.boxSizing = 'border-box';
if (bodyClass.includes('dark-theme')) {
previewContainer.style.backgroundColor = '#1e1e1e';
previewContainer.style.color = '#f0f0f0';
previewContainer.style.boxShadow = '0 0 15px rgba(4,4,8,0.25)';
} else {
previewContainer.style.backgroundColor = '#ffffff';
previewContainer.style.color = '#111';
previewContainer.style.boxShadow = '0 0 15px rgba(0,0,0,0.08)';
}
const closeBtn = document.createElement('button');
closeBtn.type = 'button';
closeBtn.textContent = '✕';
closeBtn.setAttribute('aria-label', 'Close preview');
closeBtn.style.position = 'absolute';
closeBtn.style.top = '8px';
closeBtn.style.right = '12px';
closeBtn.style.cursor = 'pointer';
closeBtn.style.fontSize = '18px';
closeBtn.style.background = 'transparent';
closeBtn.style.border = 'none';
closeBtn.style.color = bodyClass.includes('dark-theme') ? '#ddd' : '#444';
closeBtn.style.padding = '0';
closeBtn.style.lineHeight = '1';
closeBtn.addEventListener('click', () => {
previewContainer.style.display = 'none';
previewVisible = false;
});
previewContainer.appendChild(closeBtn);
const urlTitle = document.createElement('h3');
urlTitle.textContent = 'Game URL:';
previewContainer.appendChild(urlTitle);
const urlP = document.createElement('p');
urlP.textContent = gameUrl;
previewContainer.appendChild(urlP);
const dpTitle = document.createElement('h3');
dpTitle.textContent = 'Developer Products:';
previewContainer.appendChild(dpTitle);
const ul = document.createElement('ul');
ul.className = 'hlist store-cards gear-passes-container';
ul.style.overflowX = 'auto';
ul.style.whiteSpace = 'nowrap';
ul.style.listStyle = 'none';
ul.style.padding = '10px';
ul.style.margin = '0';
if (productsList.length === 0) {
const li = document.createElement('li');
li.textContent = 'No developer products found.';
li.style.fontStyle = 'italic';
li.style.color = bodyClass.includes('dark-theme') ? '#ccc' : '#666';
ul.appendChild(li);
} else {
productsList.forEach(p => {
const li = document.createElement('li');
li.className = 'list-item real-game-pass';
li.style.display = 'inline-block';
li.style.marginRight = '12px';
li.style.verticalAlign = 'top';
const card = document.createElement('div');
card.className = 'store-card';
card.style.width = '150px';
const img = document.createElement('img');
img.src = p.ImageUrl;
img.alt = p.DisplayName;
img.style.width = '150px';
img.style.height = '150px';
img.style.backgroundColor = p.ImageUrl ? "transparent" : bodyClass.includes('dark-theme') ? "#2a2a2a" : "#f0f0f0";
card.appendChild(img);
const caption = document.createElement('div');
caption.className = 'store-card-caption';
const nameDiv = document.createElement('div');
nameDiv.className = 'text-overflow store-card-name';
nameDiv.title = p.DisplayName;
nameDiv.textContent = p.DisplayName;
nameDiv.style.color = bodyClass.includes('dark-theme') ? '#f0f0f0' : '#111';
caption.appendChild(nameDiv);
const priceDiv = document.createElement('div');
priceDiv.className = 'store-card-price';
priceDiv.innerHTML = `<span class="icon-robux-16x16"></span> <span class="text-robux">${p.PriceInRobux}</span>`;
priceDiv.style.color = bodyClass.includes('dark-theme') ? '#ddd' : '#333';
caption.appendChild(priceDiv);
card.appendChild(caption);
li.appendChild(card);
ul.appendChild(li);
});
}
previewContainer.appendChild(ul);
previewContainer.style.display = 'none';
document.body.appendChild(previewContainer);
}
}
let lastUrl = location.href;
new MutationObserver(() => {
const url = location.href;
if (url !== lastUrl) {
lastUrl = url;
init();
}
}).observe(document, {subtree: true, childList: true});
init();
})();
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