msCaching
Non-standard: 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.
The 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.
Syntax
cacheState = object.msCaching
Values
Type: DOMString
| Property value | Description | 
|---|---|
auto |  Disables caching for stream or ms-stream data. | 
enabled |  Enables caching for stream or ms-stream data. | 
disabled |  Disables caching for any data. | 
See also
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    https://developer.mozilla.org/en-US/docs/Web/API/msCaching