CheckboxSelectionModel in ExtJS grid

I’ve tried to use CheckboxSelectionModel on grid, and there are no examples in documents for. It’s not clear in documentation. Ok, so you should create CheckboxSelectionModel object before it’s passing to grid as selModel, because you should specify it in columns config property. So there is example by the steps.

1. Create CheckboxSelectionModel:
   

var sm = new Ext.grid.CheckboxSelectionModel();

1. Include created object in columns list:
   

columns:[ sm, {..... rest of your columns .....} ]

1. Provide selectionModel object as current selection model for grid. You should provide selModel property in config options:
   

selMode: sm

Result:

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