index.md

---

title: set:leading()
slug: Web/EXSLT/set/leading

---

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set:leading() returns the nodes in one node-set that come before the first node in the other node-set.

Syntax

set:leading(nodeSet1, nodeSet2)

Parameters

• nodeSet1

  • : The node set to find nodes in that precede the first node in the second node set.

• nodeSet2

  • : The node set to compare against.

Returns

A node-set containing the nodes from nodeSet1 whose values precede the first node in nodeSet2.

Note: If the first node in nodeSet2 isn't contained in nodeSet1, an empty set is returned. If nodeSet2 is empty, then the result is nodeSet1.

Specifications

EXSLT - SET:LEADING