Chrome DevTools Error – DevTools Failed to Load SourceMap

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I'm trying to display an image selected from the local machine and I need the location of that image for a JavaScript function. But I'm unable to get the location.

To get the image location, I tried using console.log, but nothing returns.

console.log(document.getElementById("uploadPreview"));

Here's the HTML code:

<!DOCTYPE html>
<html>
<head>
  <title></title>
</head>

<body>
  <div align="center" style="padding-top: 50px">
    <img align="center" id="uploadPreview" style="width: 100px; height: 100px;" />
  </div>

  <div align="center" style="padding-left: 30px">
    <input id="uploadImage" type="file" name="myPhoto" onchange="PreviewImage();" />
  </div>

  <script type="text/javascript">
    function PreviewImage() {
      var oFReader = new FileReader();
      oFReader.readAsDataURL(document.getElementById("uploadImage").files[0]);

      oFReader.onload = function (oFREvent) {
        document.getElementById("uploadPreview").src = oFREvent.target.result;
        console.log(document.getElementById("uploadPreview").src);

      };
    }
  </script>

</body>
</html>

Console Output:

Enter image description here

Here's the warning:

DevTools failed to load SourceMap: Could not load content for
chrome-extension://alplpnakfeabeiebipdmaenpmbgknjce/include.preload.js.map:
HTTP error: status code 404, net::ERR_UNKNOWN_URL_SCHEME

Best Answer

That's because Chrome added support for source maps.

Go to the developer tools (F12 in the browser), then select the three dots in the upper right corner, and go to Settings.

Then, look for Sources, and disable the options:

  • "Enable JavaScript source maps"
  • "Enable CSS source maps"

If you do that, that would get rid of the warnings. It has nothing to do with your code. Check the developer tools in other pages and you will see the same warning.

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