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JavaScript: The Definitive Guide, 4th Edition
By
David Flanagan
Publisher
: O'Reilly
Pub Date
: November 2001
ISBN
: 0-596-00048-0
Pages
: 936
Slots
: 1
This fourth edition of the definitive reference to
JavaScript, a scripting language that can be embedded
directly in web pages, covers the latest version of the
language, JavaScript 1.5, as supported by Netscape 6 and
Internet Explorer 6. The book also provides complete
coverage of the W3C DOM standard (Level 1 and Level 2),
while retaining material on the legacy Level 0 DOM for
backward compatibility.
Availability
DOM Level 2 Range
Synopsis
short compareBoundaryPoints(unsigned short how,Range sourceRange)
throws DOMException;
Arguments
how
Specifies how to perform the comparison (i.e., which boundary points
to compare). Legal values are the constants defined by the Range
interface.
sourceRange
The range that is to be compared to this range.
Returns
-1 if the specified boundary point of this range is before the
specified boundary point of sourceRange, 0 if the
two specified boundary points are the same, or 1 if the specified
boundary point of this range is after the specified boundary point of
sourceRange.
Throws
If sourceRange represents a range of a different
document than this range does, this method throws a DOMException with
a code of WRONG_DOCUMENT_ERR.
Description
This method compares a boundary point of this range to a boundary
point of the specified sourceRange and returns a
value that specifies their relative order in the document source. The
how argument specifies which boundary
points of each range are to be compared. The legal values for this
argument, and their meanings, are as follows:
Range.START_TO_START
Compare the start points of the two Range nodes. Range.END_TO_END
Compare the end points of the two Range nodes. Range.START_TO_END
Compare the start point of sourceRange to
the end point of this range.
Range.END_TO_START
Compare the end point of sourceRange to
the start point of this range.
The return value of this method is a number that specifies the
relative position of this range to the specified
sourceRange. Therefore, you might expect
the range constants for the how argument
to specify the boundary point for this range first and the boundary
point for sourceRange second. Counterintuitively,
however, the Range.START_TO_END constant specifies
a comparison of the end point of this range with
the start point of the specified
sourceRange. Similarly, the
Range.END_TO_START constant specifies a comparison
of the start point of this range with the
end point of the specified range.
