startOffset

Summary

Retrieves the offset of the starting boundary point relative to the startContainer in the current range.

Syntax

Note: This property is read-only.

var startRangeOffset = range.startOffset;

Return Value

Returns an object of type NumberNumber

the offset value.

Examples

var range = document.createRange();
range.setStart(startNode,startOffset);
range.setEnd(endNode,endOffset);
var startRangeOffset = range.startOffset;

Notes

Remarks

If the boundary point offset is within a container that is not a character data node, the offset is essentially a count based on where it falls between child nodes. For example, the offset is 0 if it falls before the first child and 1 if it is between the first and second child. If the offset is within a character data node container, the value represents 16-bit unit positions.

Syntax

startRangeOffset = range.startOffset;

Standards information

Document Object Model (DOM) Level 2 Traversal and Range Specification, Section 2.13

Related specifications

DOM: Living Standard

Attributions

Mozilla Developer Network : [Range.startOffset Article]
Microsoft Developer Network: [startOffset Property Article]