Error: invalid button: 3

[zepumph]

I got this error while trying to use my back button on my mouse. I'm not sure how we want to handle this, but I don't think erroring out is ideal. I also go this (with "4") when using the forward button on my mouse. What do you think @jonathanolson. Here is the switch case that is causing issues:

    down: function( point, event ) {
      var pointChanged = this.hasPointChanged( point );
      point && sceneryLog && sceneryLog.InputEvent && sceneryLog.InputEvent( 'mouse down at ' + point.toString() );
      // if ( this.point ) { this.point.freeToPool(); }
      this.point = point;
      this.isDown = true;
      switch( event.button ) {
        case 0:
          this.leftDown = true;
          break;
        case 1:
          this.middleDown = true;
          break;
        case 2:
          this.rightDown = true;
          break;
        default:
          throw new Error( 'invalid button: ' + event.button );
      }

[jonathanolson]

Yup, this is one of the errors that will happen until #803 is fixed. Instead it will record what button numbers are pressed.

[zepumph]

I'm not sure I understand, and maybe I don't need to, but I feel like only recently did using my mouse's back button begin to error out in master. Does this need to error out? Can't we just ignore other mouse buttons and let the browser have them?

[jonathanolson]

We can probably temporarily patch things so it ignores other buttons. Would you recommend that?

[zepumph]

That sounds really nice! I would appreciate that if it was easy.

[jonathanolson]

Can you see if the above commit fixes this particular thing from erroring out?

[zepumph]

That's very nice, I appreciate the workaround, as I was hitting this error about 20 times a day. Thanks!