I’m trying to bring back the custom background feature that was removed from a popular streaming site. The platform used to let users upload their own channel backgrounds but they took this option away.
Here’s the current HTML structure I’m working with:
Your selector’s targeting the wrong parent element. You’re trying to select div#main-content as a direct child of the data-username element, but there’s a .page-wrapper div between them in your HTML structure. Try this fix:
I’ve done similar userscripts for streaming platforms and sometimes DOM elements load dynamically. If that’s happening here, you might need to add a delay or use MutationObserver instead of document ready.
Had this exact issue when I was tweaking a video platform’s layout last year. The timing’s the killer here - streaming sites load content after the page loads, so document ready selectors just break. Don’t mess around with setTimeout delays. Use a MutationObserver instead to wait for the actual content to show up. Here’s what worked for me: set up an observer that watches for #main-content to exist, then inject your background image right away. Also, fix that img tag - use either <img /> or proper <img></img> closing tags. Your selector looks fine if the DOM structure stays put, but most streaming platforms rebuild their DOM constantly. You’ll need the observer approach to handle re-injections when users switch channels.
the site’s probably loading content async after the page loads. wrap your code in a setTimeout or check if the elements exist before prepending. also, that img tag syntax is wrong - should be self-closing <img ... /> not </img>
Yeah, the async loading is definitely an issue, but don’t mess around with timeouts and guesswork. Just automate the whole thing.
I built something like this for our company’s streaming setup. Managing userscripts gets messy fast when you’ve got multiple streamers or different backgrounds.
Set up a workflow that watches for DOM changes and auto-injects your custom backgrounds. Store all your images in one spot, map them to specific streamers, and let it handle the timing automatically. No more setTimeout nonsense.
The workflow waits for main-content div to load, then immediately drops in the right background using the data-username attribute. When streamers change or the site updates? No manual script fixes needed.
You can even add background rotation, A/B test different images, or pull from a database based on stream categories.
Way cleaner than juggling userscripts across browsers and users.
You’re injecting a custom background image into a streaming site using a userscript, but the image isn’t appearing or is disappearing intermittently. The browser’s Content Security Policy (CSP) might be blocking external image URLs, and the dynamic nature of the streaming site’s DOM requires a robust solution beyond a simple document.ready event listener.
Understanding the “Why” (The Root Cause):
Streaming platforms often employ strict Content Security Policies (CSPs) to prevent malicious scripts from injecting content. These policies frequently block images from external sources, resulting in your <img> tag failing to load the background image. Furthermore, these sites constantly update their DOM structure, meaning that a one-time injection using document.ready is insufficient. The background image needs to be re-injected whenever the site’s DOM changes to ensure its persistence. Using setInterval for continuous re-injection handles dynamic content updates, but this approach is less efficient than a more sophisticated technique.
Step-by-Step Guide:
Encode your image as Base64: The most reliable solution is to bypass the CSP by encoding your background image as a Base64 string and embedding it directly into your userscript. This avoids fetching the image from an external URL. Many online tools can perform this conversion.
// Example (replace with your actual Base64 encoded image data)
const base64Image = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==";
Inject the Base64 Image: Modify your jQuery code to use the Base64 encoded image:
Implement a MutationObserver: Since the streaming site’s DOM likely changes frequently, use a MutationObserver to detect these changes and re-inject the image as needed:
const targetNode = document.getElementById('main-content'); //Target the relevant container
const config = { childList: true, subtree: true }; //Observe changes in children
const callback = function(mutationsList, observer) {
for(const mutation of mutationsList) {
if (mutation.type === 'childList') {
//Re-inject the image to ensure it's always present
$("#main-content").prepend(`<img height='1080' width='1920' src='${base64Image}' class='custom-bg'></img>`);
}
}
};
const observer = new MutationObserver(callback);
if(targetNode){ //Check if the target node exists
observer.observe(targetNode, config);
}
Common Pitfalls & What to Check Next:
Image Size: A very large Base64 encoded image can significantly increase the userscript’s size and potentially impact performance. Consider optimizing your image for smaller file size before conversion.
Error Handling: Add error handling to your code to gracefully handle situations where #main-content is not found. Check for null values before attempting to manipulate the DOM element.
Selector Specificity: While #main-content is used here, ensure this selector is specific enough to target the correct container and not interfere with other elements on the page.
Still running into issues? Share your (sanitized) config files, the exact command you ran, and any other relevant details. The community is here to help!
Understanding the “Why” (The Root Cause):
Step-by-Step Guide:
Common Pitfalls & What to Check Next:
Still running into issues? Share your (sanitized) config files, the exact command you ran, and any other relevant details. The community is here to help!