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Bug
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Resolution: Fixed
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Major
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8.5.1, 9.5.1.2
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Security Level: Jimmy
Steps to Reproduce
Run fiddle
https://zkfiddle.org/sample/1u2u7ai/5-Another-new-ZK-fiddle
Click button to open both nodes at the same time
Current Result
JS error:
1 Errors
Failed to process
setAttr
Cannot read property 'checked' of null (TypeError)
zk.wpd:44276 Uncaught (in promise) TypeError: Cannot read property 'checked' of null at init.bind_ (zk.wpd:44276) at init.bind_ (za11y.wpd:10) at init.bindChildren_ (zk.wpd:23546) at init.bind_ (zk.wpd:23509) at init.bind_ (za11y.wpd:5) at init.$supers (zk.wpd:12886) at init.bind_ (zul.sel.wpd:5715) at init.bind_ (za11y.wpd:104) at init.bindChildren_ (zk.wpd:23546) at init.bind_ (zk.wpd:23509) bind_ @ zk.wpd:44276 bind_ @ za11y.wpd:10 bindChildren_ @ zk.wpd:23546 bind_ @ zk.wpd:23509 bind_ @ za11y.wpd:5 $supers @ zk.wpd:12886 bind_ @ zul.sel.wpd:5715 bind_ @ za11y.wpd:104 bindChildren_ @ zk.wpd:23546 bind_ @ zk.wpd:23509 bind_ @ za11y.wpd:5 bind_ @ za11y.wpd:103 bindChildren_ @ zk.wpd:23546 bind_ @ zk.wpd:23509 bind_ @ za11y.wpd:5 bind_ @ za11y.wpd:94 bind @ zk.wpd:23427 insertChildHTML_ @ zul.sel.wpd:4777 insertChildHTML_ @ zk.wpd:54236 _rodRender @ zk.wpd:54085 _renderItem @ zk.wpd:54110 setOpen @ zk.wpd:54130 _set2 @ zk.wpd:12126 setter.func @ zk.wpd:21706 zk.Widget.zk.$extends.set @ zk.wpd:21734 setAttr @ zk.wpd:30272 doProcess @ zk.wpd:28692 doCmdsNow @ zk.wpd:28791 _doCmds @ zk.wpd:29155 afterResponse @ zk.wpd:29662 _onResponseReady @ zk.wpd:29517 (anonymous) @ zk.wpd:28767 Promise.then (async) (anonymous) @ zk.wpd:28765 Promise.then (async) ajaxSendNow @ zk.wpd:28764 sendNow @ zk.wpd:29383 (anonymous) @ zk.wpd:28734 setTimeout (async) ajaxSend2 @ zk.wpd:28734 ajaxSend @ zk.wpd:28728 send @ zk.wpd:29031 sendAU_ @ zk.wpd:24243 fireX @ zk.wpd:24181 doClick_ @ zk.wpd:43525 _doEvt @ zk.wpd:27369 (anonymous) @ zk.wpd:27565 dispatch @ zk.wpd:5614 elemData.handle @ zk.wpd:5418
Expected Result
No error
Debug Information
Caused by the checkbox located inside the target treeitem's child accessing the DOM (.$n()) while the widget is no longer in the DOM
Order of events causing this situation:
- Both 1st level nodes (first block and target) are rendered closed.
- First block contains enough children to push the target node over the ROD limit
- Since both nodes are created closed, they are both initially rendered. (both in the ROD viewport)
- When both nodes are opened, they both receive setOpen before their children are rendered, so the target node is "on screen" while initially receiving the command.
- When the first block renders its children, it pushed target out of the rendered node limit, but target has already done setOpen and has started rendering its own content.
- Since the node is no longer in the DOM, if a descendant of the target Treeitem tries to access DOM, it will fail. Other methods may also be unstable due to ROD / rendering uncertainty.
Workaround
Disable Tree ROD with
<custom-attributes org.zkoss.zul.tree.initRodSize="-1"/>
- relates to
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ZK-3835 Improve Tree client ROD rendering method
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- Closed
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