verge viewport suite

div#a

test code	expected type	live output
`$.inViewport(a, -100)`	`boolean`
`$.inViewport(a)`	`boolean`
`$.inViewport(a, 100)`	`boolean`
`$.viewportW()`	`number`
`$.viewportH()`	`number`
`$.scrollX()`	`number`
`$.scrollY()`	`number`
`$.rectangle(a).top`	`number`
`$.rectangle(a).bottom`	`number`
`$.rectangle(a).left`	`number`
`$.rectangle(a).right`	`number`
`$.rectangle(a).width`	`number`
`$.rectangle(a).height`	`number`
`$.inViewport(b, 100)`	`boolean`
`$.inViewport(b)`	`boolean`
`$.inViewport(b, -100)`	`boolean`

div#b

div#c