Yoctopuce Yocto-Display, User Manual

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22. High-level API Reference
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YFiles
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load_async()
Preloads the filesystem cache with a specified validity duration (asynchronous version).
js
function load_async( msValidity , callback , context )
By default, whenever accessing a device, all function attributes are kept in cache for the standard
duration (5 ms). This method can be used to temporarily mark the cache as valid for a longer period, in
order to reduce network trafic for instance.
This asynchronous version exists only in Javascript. It uses a callback instead of a return value in order
to avoid blocking the Javascript virtual machine.
Parameters :
msValidity an integer corresponding to the validity of the loaded function parameters, in milliseconds
callback callback function that is invoked when the result is known. The callback function receives three
arguments: the caller-specific context object, the receiving function object and the error code
(or
YAPI_SUCCESS )
context caller-specific object that is passed as-is to the callback function
Returns :
nothing : the result is provided to the callback.