 There are times where you have a source map but you want to keep it private, especially for your production code. In that case, when you are debugging that, you might want to attach the private source map manually. In this example, we hide the source map by default. There is no source URL in the generator code as well. Right-click on the page and select Add Source Map. Enter the URL of your private source map. If the URL is invalid, there will be warnings in the Developer Resources tab as well as the console. Try again with a valid URL. And there you go. The files loaded successfully and your source is once again mapped.