Autodesk Forge Viewer最新版本测量工具栏报错问题咨询

Hey there, this is actually a known issue that’s popped up for a number of developers using the 7.x branch of the Forge Viewer, specifically tied to the measurement toolbar extension’s initialization in certain scenarios.

Here’s what you need to know:

• Root cause: This bug typically occurs when the measurement extension tries to access DOM elements that haven’t fully finished loading, or if there’s a conflict with custom extensions that modify the viewer’s UI before the measurement toolbar gets initialized.
• Fix timeline: Autodesk’s engineering team has acknowledged this issue and rolled out a patch in the newer minor releases of the 7.x line. If you’re using a version older than 7.69.0, updating to the latest available 7.x release should resolve the error immediately.
• Temporary workaround (if you can’t update right now): You can delay the initialization of the measurement extension until the viewer is fully ready by listening for the VIEWER_READY_EVENT, then loading it explicitly with this code snippet:

  viewer.addEventListener(Autodesk.Viewing.VIEWER_READY_EVENT, () => {
      viewer.loadExtension('Autodesk.Measure').catch(err => console.warn('Measurement extension load warning:', err));
  });
  

Also, make sure to double-check that you aren’t loading the measurement extension multiple times—this can also trigger similar unexpected errors.

内容的提问来源于stack exchange，提问作者Toni Maccheroni