Learning jQuery 3 - Fifth Edition

Triggering widget events

A great plugin not only extends jQuery, but also offers plenty of opportunities for other code to extend the plugin itself. One simple way to offer this extensibility is to support a set of custom events related to the plugin. The widget factory makes this process straightforward:

_open() {  if (this.options.disabled) {    return;  }  const elementOffset = this.element.offset();  this._tooltipDiv    .css({      position: 'absolute',      left: elementOffset.left + this.options.offsetX,      top:        elementOffset.top +        this.element.height() +        this.options.offsetY    })    .text(this.options.content(this.element))    .show();  this._trigger('open');},_close: function() {   this._tooltipDiv.hide();   this._trigger('close'); } 

Listing 8.23

Calling this._trigger() ...