## Subject of the issue grid.on("added change removed", function(e, items) { ... }); not working: items is undefined. Error that manifests for items: "Uncaught TypeError: Cannot read property 'length' of undefined" ## Your environment GridStack version: 1.0.0 Browser and its version: Chromium v80.0.3987.87 ## Steps to reproduce Working jsfiddle demo: https://jsfiddle.net/0rpyh32u/1/ 1. Load page 2. Try to move Widget 1, for example 3. Check console output with F12 developer tools 4. Error "Uncaught TypeError: Cannot read property 'length' of undefined" should be seen ## Expected behaviour items is defined and can be iterated through ## Actual behaviour items is undefined ## Other notes Discussed in Slack thread https://gridstackjs.slack.com/archives/C0LPPLXJR/p1582557973010800. Apparently, error rises due to the fact that grid.on(...) doesn't support multiple events as jQuery does.