Your environment

• Version ofjquery-validate: v1.19.3
• Browser name and version: firefox 109.0.1

Current behavior

When using rulelessThan comparing to an empty field, error is triggered.

Expected behavior

Error should only be triggered if both fields are populated; user could/should addrequired to the other field if necessary.

Live demo

QUnit.test("form(): with lessThan",function(assert ) {assert.expect(2 );var form =$( "#testForm5" )[ 0 ],v =$( form ).validate();$("#x1, #x2" ).val("hi" );assert.ok( v.form(),"Valid form" );$("#y2" ).val("" );assert.ok( v.form(),"Valid form" );} );