Opened 8 years ago

Closed 8 years ago

#17393 closed defect (fixed) addChild method has a logical flaw

Reported by: mmckenziedev Owned by: Sebastien Brunot
Priority: undecided Milestone: 1.10
Component: DojoX Mobile Version: 1.9.1
Keywords: Cc:
Blocked By: Blocking:


The standard behaviour of a widget is that we can add child widgets to the parent before a widget's startup method had been called. In we have this:

addChild: function(/*Widget*/ widget, /*int?*/ insertIndex){
                        this.expand(widget, true);
                       = "";

We only call _setupChild from addChild when the widget has been started and this._started is true. In _setupChild we create an _AccordionTitle object for the child of the Accordion.

In _addChildAriaAttrs, we reference the _AccordionTitle object of the all the children of the Accordion object.

_addChildAriaAttrs: function(){
        var posinset = 1;
        var children = this.getChildren();
        array.forEach(children, function(child){
                domAttr.set(child._at.textBoxNode, "aria-posinset", posinset++);
                domAttr.set(child._at.textBoxNode, "aria-setsize", children.length);

But as we can see from addChild, we will call _addChildAriaAttrs wether the widget has been started or not, and wether _setupChild has been called on a child widget or not.

So to conclude, _addChildAriaAttrs will get called on a child element which does not have an _AccordionTitle created for it, so we will get an error from the browser like:

Cannot read property 'textBoxNode' of undefined

because child._at.textBoxNode will not exist because child._at has not been set and so it is undefined.

My suggestion would be to place _addChildAriaAttrs inside the conditional this._started block of addChild.

Attachments (1)

Accordion.js (15.7 KB) - added by mmckenziedev 8 years ago.
Accordion.js with the error fixed

Download all attachments as: .zip

Change History (6)

Changed 8 years ago by mmckenziedev

Attachment: Accordion.js added

Accordion.js with the error fixed

comment:1 Changed 8 years ago by Patrick Ruzand

Milestone: tbd1.10
Owner: set to Patrick Ruzand
Status: newassigned

comment:2 Changed 8 years ago by Patrick Ruzand

Do you have signed a CLA ?

comment:3 Changed 8 years ago by Patrick Ruzand

Owner: changed from Patrick Ruzand to Sebastien Brunot

comment:4 Changed 8 years ago by Sebastien Brunot

A pull request has been created to fix this issue:

comment:5 Changed 8 years ago by Patrick Ruzand <[email protected]…>

Resolution: fixed
Status: assignedclosed

In b1aa28393ca4794f1ff5b4d3e3afa17e4ce0352d/dojox:

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