show stack trace for some rendering errors

Author: striezel

changelog.md

@@ -10,6 +10,12 @@ Since [Plotly.js](https://plotly.com/javascript/) is the main dependency of this
 application, major version changes in Plotly.js will also trigger a major
 version change in this application.
 
+## Version 5.8.9 (2024-10-27)
+
+* __[improvement]__
+A stack trace for some rendering errors is now logged to the console, if a stack
+trace is available.
+
 ## Version 5.8.8 (2024-10-25)
 
 * __[maintenance]__

export-server/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "plotly-node-export-server",
-  "version": "5.8.8",
+  "version": "5.8.9",
   "description": "Plotly.js Node.js export server",
   "repository": {
     "url": "https://gitlab.com/striezel/plotly-node-export-server.git",

export-server/package.json

@@ -101,6 +101,10 @@ exports.render = async function(jsonData, filename, width, height) {
     })
     .catch(function(error) {
       console.log("Error occurred: " + error);
+      let hasStack = error.stack && typeof error.stack === 'string';
+      if (hasStack) {
+        console.log("Stack trace: " + error.stack);
+      }
       result = { success: false, failure: 'promise-rejected' };
       return result;
     });