lib/core/slider.js
function moveToPrevious(priv) {
  moveTo(priv, (priv.toIndex - 1 + priv.slides.length) % priv.slides.length);
}
function moveToPrevious(priv) {
  moveTo(priv, (priv.toIndex - 1 + priv.slides.length) % priv.slides.length);
}
function moveToPrevious ( priv ) { moveTo ( priv , ( priv . toIndex - 1 + priv . slides . length ) % priv . slides . length ) ; }
Moves slider previous slide.

@precondition ${link Slider.prototype.start} was called on this slider

@fqn Slider.prototype.moveToPrevious
Moves slider previous slide .