JavaScript node.compareDocumentPosition() Method

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JavaScript node.compareDocumentPosition() Method

The node.compareDocumentPosition() method compares two given nodes, and returns an integer describing where they are positioned in the document.

Example

HTML Online Editor
<!DOCTYPE html> <html> <body> <p id="point1">I'm paragraph 1</p> <p id="point2">I'm paragraph 2</p> <button onclick="myFunction()">Click Me</button> <script> var p1 = document.getElementById("point1"); var p2 = document.getElementById("point2"); function myFunction(){ alert(p1.compareDocumentPosition(p2)); } </script> </body> </html>

Syntax

node.compareDocumentPosition(otherNode)

Parameter Values

ValueTypeExplanation
otherNodeRequiredThe other Node with which to compare document positioning.

Return Values

ValueExplanation
0p1 and p2 are same element.
1p1 and p2 do not belong to the same document.
2p1 is positioned after p2.
4p1 is positioned before p2.
8p1 is positioned inside p2.
16p2 is positioned inside p1.
32p1 and p2 has no relationship.

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