add a test js file
comm
Revert "comm"

This reverts commit 02463fa4987d3794b4d3f04760f64ac9df1c8fdd.
Revert "Revert "comm""

This reverts commit 1856a86dae4a9ef9f9b7540a63894cb20de884fd.
Revert "Revert "Revert "comm"""

This reverts commit 187575c2819fcbfd0e81c3e14be1213958e5c905.