# CDN: Chunk Loading & Troubleshooting
When using the Myop SDK via CDN (`
```
This tells the SDK to always load chunks from the specified URL, ignoring the auto-detected path.
### Full Example
```html
```
### WordPress / LiteSpeed Example
If LiteSpeed has already combined your scripts, add the override snippet in your theme's `` **before** the combined script:
```html
```
## Automatic CDN Fallback
Starting from SDK version **0.3.25**, the SDK automatically retries chunk loading from the CDN when a chunk fails to load from the detected path. This handles most caching proxy scenarios without requiring the `__public_path__` override.
However, setting `__public_path__` is still recommended when you know a proxy is in use — it avoids the initial failed request and the retry delay.
## Diagnosing Chunk Loading Issues
### Symptoms
- Components don't render (blank container)
- Console shows `timeout_5000` errors
- Network tab shows **404** responses for `_HostSDK.*.min.js` or `_IframeSDK.*.min.js`
### Steps to Diagnose
1. **Open DevTools → Network tab** and filter by `_HostSDK` or `_IframeSDK`
2. Check the **URL** of the failed request — if it points to your domain instead of `cdn.myop.dev`, a caching proxy has rewritten the script source
3. **Open DevTools → Console** and run:
```js
console.log(window.__federation__.__public_auto_path__);
```
If this shows your domain instead of `cdn.myop.dev`, the base path was mis-detected
### Quick Console Fix (for testing)
To verify the fix before making code changes, run this in the console **before** navigating to the page, or use it as a browser override:
```js
window.__federation__ = {
__public_path__: 'https://cdn.myop.dev/sdk/next'
};
```
Then reload the page. If components load correctly, add the `__public_path__` snippet to your HTML.
## `__federation__` Reference
| Property | Type | Description |
|----------|------|-------------|
| `__public_path__` | `string` | Explicit base URL for chunk loading. Takes priority over auto-detection. |
| `__public_auto_path__` | `string` | (Read-only) Auto-detected base path from `document.currentScript.src` |
| `__use_public_auto_path__` | `boolean` | (Internal) Whether auto-detection is active |
| `__loading_timeout__` | `number` | Chunk loading timeout in ms (default: 5000) |