dist/pixi-graph.umd.js
/**
       * handle wheel events
       * @param {WheelEvent} event
       */
handle wheel events
@param {WheelEvent} event
handle wheel events @param { WheelEvent } event
handleWheel(event) {
          if (this.viewport.pause || !this.viewport.worldVisible) {
              return
          }
          if (this.viewport.options.interaction && this.viewport.options.interaction.interactionDOMElement !== event.target) {
              return
          }
          const point = this.viewport.toLocal(this.getPointerPosition(event));
          if (this.viewport.left <= point.x && point.x <= this.viewport.right && this.viewport.top <= point.y && point.y <= this.viewport.bottom) {
              const stop = this.viewport.plugins.wheel(event);
              if (stop && !this.viewport.options.passiveWheel) {
                  event.preventDefault();
              }
          }
      }
handleWheel ( event ) { if ( this . viewport . pause || ! this . viewport . worldVisible ) { return } if ( this . viewport . options . interaction && this . viewport . options . interaction . interactionDOMElement !== event . target ) { return } const point = this . viewport . toLocal ( this . getPointerPosition ( event ) ) ; if ( this . viewport . left <= point . x && point . x <= this . viewport . right && this . viewport . top <= point . y && point . y <= this . viewport . bottom ) { const stop = this . viewport . plugins . wheel ( event ) ; if ( stop && ! this . viewport . options . passiveWheel ) { event . preventDefault ( ) ; } } }
handle wheel events
 @param {WheelEvent} event
handle wheel events @param { WheelEvent } event
// do not handle events coming from other elements
 // only handle wheel events where the mouse is over the viewport
