This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
msCaching read/write property specifies whether stream data downloaded using XMLHttpRequestis cached to disk or not.
This proprietary method is specific to Internet Explorer and Microsoft Edge.
cacheState = object.msCaching
||Disables caching for stream or ms-stream data.|
||Enables caching for stream or ms-stream data.|
||Disables caching for any data.|