9.1.1 The viewport

Chapter 9 - Visual formatting model - 9.1.1 The viewport

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first-line-selector-014

:first-line pseudo-element - text-transform

first-line-selector-015

:first-line pseudo-element - text-transform
The :first-line pseudo-element can be attached to an unordered list because it is a block-level element. The "first formatted line" of an unordered list occurs inside its first list-item because it is a non-positioned and non-floated block-level descendant in the same flow. User agents may change the document's layout (preferred behavior but nonetheless optional) when the viewport is resized.

root-canvas-001

Canvas: Embedded documents

viewport-001 (interact, may)

Viewport resize can change layout
Resizing the viewport may change the layout of page.

viewport-002 (interact, should)

Scrolling mechanism
Scrolling mechanism should be available when canvas is larger than viewport.

viewport-003 (interact, should)

Scrolling mechanism and right-to-left
Scrolling mechanism should be available when canvas is larger than viewport even when page is set to right-to-left.

viewport-004 (may)

Rendering more than one canvas
User agents may render more than one canvas.