| object | Halogen.HTML.Elements, Halogen.HTML |
| ObjectBoundingBox | Halogen.Svg.Attributes |
| object_ | Halogen.HTML.Elements, Halogen.HTML |
| offline | Web.HTML.Event.EventTypes |
| ol | Halogen.HTML.Elements, Halogen.HTML |
| ol_ | Halogen.HTML.Elements, Halogen.HTML |
| onAbort | Halogen.HTML.Events |
| onAuxClick | Halogen.HTML.Events |
| onBlur | Halogen.HTML.Events |
| onChange | Halogen.HTML.Events |
| onChecked | Halogen.HTML.Events |
| onClick | Halogen.HTML.Events |
| onCopy | Halogen.HTML.Events |
| onCut | Halogen.HTML.Events |
| onDoubleClick | Halogen.HTML.Events |
| onDrag | Halogen.HTML.Events |
| onDragEnd | Halogen.HTML.Events |
| onDragEnter | Halogen.HTML.Events |
| onDragExit | Halogen.HTML.Events |
| onDragLeave | Halogen.HTML.Events |
| onDragOver | Halogen.HTML.Events |
| onDragStart | Halogen.HTML.Events |
| onDrop | Halogen.HTML.Events |
| OneGridLine | Clay.Extra.Grid |
| onError | Halogen.HTML.Events |
| onFocus | Halogen.HTML.Events |
| onFocusIn | Halogen.HTML.Events |
| onFocusOut | Halogen.HTML.Events |
| onInput | Halogen.HTML.Events |
| onInputValueChange | Halogen.HTML.Events |
| onInvalid | Halogen.HTML.Events |
| onKeyDown | Halogen.HTML.Events |
| onKeyUp | Halogen.HTML.Events |
| online | Web.HTML.Event.EventTypes |
| onLoad | Halogen.HTML.Events |
| onMouseDown | Halogen.HTML.Events |
| onMouseEnter | Halogen.HTML.Events |
| onMouseLeave | Halogen.HTML.Events |
| onMouseMove | Halogen.HTML.Events |
| onMouseOut | Halogen.HTML.Events |
| onMouseOver | Halogen.HTML.Events |
| onMouseUp | Halogen.HTML.Events |
| onPaste | Halogen.HTML.Events |
| onReset | Halogen.HTML.Events |
| onResize | Halogen.HTML.Events |
| onScroll | Halogen.HTML.Events |
| onSelect | Halogen.HTML.Events |
| onSelectedIndexChange | Halogen.HTML.Events |
| onSubmit | Halogen.HTML.Events |
| onTouchCancel | Halogen.HTML.Events |
| onTouchEnd | Halogen.HTML.Events |
| onTouchEnter | Halogen.HTML.Events |
| onTouchLeave | Halogen.HTML.Events |
| onTouchMove | Halogen.HTML.Events |
| onTouchStart | Halogen.HTML.Events |
| onTransitionEnd | Halogen.HTML.Events |
| onValueChange | Halogen.HTML.Events |
| onValueInput | Halogen.HTML.Events |
| onWheel | Halogen.HTML.Events |
| optgroup | Halogen.HTML.Elements, Halogen.HTML |
| optgroup_ | Halogen.HTML.Elements, Halogen.HTML |
| option | Halogen.HTML.Elements, Halogen.HTML |
| option_ | Halogen.HTML.Elements, Halogen.HTML |
| OrderedListAlphabetic | DOM.HTML.Indexed |
| OrderedListNumeric | DOM.HTML.Indexed |
| OrderedListType | DOM.HTML.Indexed |
| Orient | Halogen.Svg.Attributes |
| orient | Halogen.Svg.Attributes |
| orientation | Halogen.HTML.Properties.ARIA |
| output | |
| 1 (Function) | Halogen.HTML.Elements, Halogen.HTML |
| 2 (Function) | Halogen.Component |
| output_ | Halogen.HTML.Elements, Halogen.HTML |
| owns | Halogen.HTML.Properties.ARIA |