Store data in widget preferences
This code shows how to store key-value pairs susng Widget Preferences.
//for store any predefined value or static value in widget configuration editor
<preference name="key" value="value" readonly="false"/>
//for read/write data in code
var key = "key",
value;
if (typeof widget.preferences[key] !== "undefined") {
//read data
value = widget.preferences.getItem(key);
}
//write data
widget.preferences.setItem(key, value);