Tree filtering in ExtJs?

Question

JavaScript

There is a field for filtering.

xtype: 'triggerfield',
    listeners: {
        change: function() {
        console.log()
    }
}

And there is a Tree Panel, tell me how can I send a request to the server with an input value in this field?

Answer 1

{
    xtype: 'triggerfield',
    listeners: {
        change: function(newVal, oldVal, field) {
            console.log('new value', newVal);
            console.log('old value', oldVal);
            console.log('field', field);
        } 
    }
}