LET url = @lab.cdn.dynamic + "?redirect=/events"
LET doc = DOCUMENT(url, true)

WAIT_ELEMENT(doc, "#page-events")

// with fixed timeout
LET b1 = ELEMENT(doc, "#wait-no-class-btn")
LET c1 = ELEMENT(doc, "#wait-no-class-content")

CLICK(b1)
WAIT_NO_ATTR(c1, "class", "alert alert-success")

// with random timeout
LET b2 = ELEMENT(doc, "#wait-no-class-random-btn")
LET c2 = ELEMENT(doc, "#wait-no-class-random-content")

CLICK(b2)
WAIT_NO_ATTR(c2, "class", "alert alert-success", 10000)

RETURN NONE