it is exact copy of the same resource, I merely upload it to my server to understand the resource functions.
This download file cannot run on local machines, and only runs on secure web server.  See: https://iwant2study.org/ospsg/index.php/interactive-resources/physics/04-waves/04-light/924-optics-bench-js-written-by-wolfgang-christian-and-michael-j-lee

The iwant2study Optics Bench page is https://iwant2study.org/lookangejss/04waves_13light/Java/opticsbench/index.html
is used to serve the files.