[js:core] pass an event object as this into callback of fm.bind() or fm.one()

[nao-pon]

The event object has the data passed in fm.trigger() in the data attribute. However, if the data to be handled is large, it becomes overhead of script execution.

fm.bind('open', function(event) {
    event; // event object
    event.data // data passed in fm.trigger()
});

For more light way

fm.bind('open', function() {
    this; // Make `this` an event object
    this.data // undefind, this has not data
});