LET url = @dynamic + "?redirect=/events"
LET doc = DOCUMENT(url, true)
LET selector = "#wait-class-btn"

WAIT_ELEMENT(doc, "#page-events")

LET el = ELEMENT(doc, selector)

ATTR_SET(el, "style", "width: 100%")
WAIT_STYLE(doc, selector, "width", "100%")

LET prev = el.style

ATTR_SET(el, "style", "width: 50%")
WAIT_NO_STYLE(doc, selector, "width", "100%")

LET curr = el.style

RETURN prev.width == "100%" && curr.width == "50%" ? "" : "style should be changed"