selection

Summary

The class of the object returned by window.getSelection() and other methods.

Description

A selection object represents the ranges that the user has selected. Typically, it holds only one range, accessed as follows:

range = sel.getRangeAt(0);

Calling the toString() method returns the text contained in the selection, e.g

selObj = window.getSelection();
window.alert(selObj);

Glossary

Other key terms used in this section.

anchor
The anchor of a selection is the beginning point of the selection. When making a selection with a mouse, the anchor is where in the document the mouse button is initially pressed. As the user changes the selection using the mouse or the keyboard, the anchor does not move.
focus
The focus of a selection is the end point of the selection. When making a selection with a mouse, the focus is where in the document the mouse button is released. As the user changes the selection using the mouse or the keyboard, the focus is the end of the selection that moves.
range
A range is a contiguous part of a document. A range can contain entire nodes as well as portions of nodes, such as a portion of a text node. A user will normally only select a single range at a time, but it's possible for a user to select multiple ranges (e.g. by using the Control key). A range can be retrieved from a selection as a range object. Range objects can also be created via the DOM and programmatically added or removed from a selection.

Properties

anchorNode
선택이 시작된 곳의 Node를 리턴한다. 클릭한 적이 없는 iframe과 같이, 한 번도 문서에서 선택을 한적이 없으면, null 을 리턴한다.
anchorOffset
Returns the number of characters that the selection's anchor is offset within the anchorNode.
focusNode
선택이 끝난 노드를 리턴한다.
focusOffset
Returns the number of characters that the selection's focus is offset within the focusNode.
isCollapsed
선택 영역의 시작점과 끝점이 같은 위치에 있는지를 나타내는 boolean 값을 리턴한다.
rangeCount
선택한 범위의 크기를 리턴한다.

Methods

getRangeAt
Returns a range object representing one of the ranges currently selected.
collapse
선택된 영역을 단일 지점으로 축소한다
extend
특정 지점으로 선택 영역의 포커스를 옮긴다.
collapseToStart
선택 영역의 포커스를 앵커와 같은 지점으로 옮긴다.
collapseToEnd
Moves the anchor of the selection to the same point as the focus. The focus does not move.
selectAllChildren
Adds all the children of the specified node to the selection.
addRange
A range object that will be added to the selection.
removeRange
Removes a range from the selection.
removeAllRanges
Removes all ranges from the selection.
deleteFromDocument
Deletes the selection's content from the document.
selectionLanguageChange
toString
Returns a string currently being represented by the selection object, i.e. the currently selected text.
containsNode
Indicates if a certain node is part of the selection.

See also

window.getSelection, Range