1 Answer

Look for any array of properties that has a trailing , (comma).
This can happen easily in ExtJS source code where frequently you will have a list of comma separated properties, then you delete the last one of those properties and you forget to remove the trailing comma.

Firefox doesn't complain, but Internet Explorer throws a cryptic error message.

The worst issue is that Internet Explorer gives you a line number and character position that seems worth nothing. It doesn't even tell you, in which source file your bug is.
Do you see the buggy comma in the example below? I marked it red, yet it's still not easy to spot. I guess my source code is messy :-|


gridFruits = new Ext.grid.EditorGridPanel({
store: storeFruits,
cm: new Ext.grid.ColumnModel([
{header:"Fruit", width: 30, sortable:true, dataIndex:'group',
editor:new Ext.form.TextField({allowBlank:false })},

{header:"Vitamin", width: 15, sortable:true, dataIndex:'vitamin'},

{header:"Profile", width: 15, sortable:true, dataIndex:'profile',
renderer: displayProfile},
]),
viewConfig: { forceFit: true },
sm: new Ext.grid.RowSelectionModel({singleSelect:true}),
clicksToEdit:2,
height: 444
});

11 years ago. Rating: 2
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