Tests for https://jsfiddle.net/wLexc6pt/6/ fiddle

Colspan Header Colspan Header
SubHeader
SubHeader
SubHeader
SubHeaderColumn filter
SubHeaderColumn filter
SubHeaderColumn filter
SubHeaderColumn filter
Value Value Value Filter Value 1 Filter Value 1 Filter Value 1 Filter Value 1
Value Value Value Filter Value 1 Filter Value 1 Filter Value 1 Filter Value 1
Value Value Value Filter Value 2 Filter Value 2 Filter Value 2 Filter Value 2
Value Value Value Filter Value 3 Filter Value 3 Filter Value 3 Filter Value 3
Value Value Value Filter Value 3 Filter Value 3 Filter Value 3 Filter Value 3
Value Value Value Filter Value 4 Filter Value 4 Filter Value 4 Filter Value 4
Value Value Value Filter Value 5 Filter Value 5 Filter Value 5 Filter Value 5

TableFilter pop-up filters with grouped headers

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Running...