This heavily depends on the use case… For a very basic and simple example, something like this does the trick:
orbit.addEventListener( 'change', function(){
if (this.target.x < -1){
this.target.x = -1;
camera.position.x = -1;
} else if (this.target.x > 1){
this.target.x = 1;
camera.position.x = 1;
}
})