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Add note on remembering previously allowed ports (#107) #226

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Add note on remembering previously allowed ports (#107) #226

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Expand Up @@ -400,6 +400,17 @@ <h3>
ports which the user has allowed the site to access
as the result of a previous call to {{Serial/requestPort()}}.
</li>
<div class="note">
An implementation is allowed to have a storage mechanism that
remembers ports that have been allowed from previous calls of
{{Serial/requestPort()}} from previous times the user has
visited the same site. Implementations should take caution that
a device will not always have the same port name, as this is up
to the operating system, and thus there is a danger that
allowing access to a previously allowed port may grant access
to a different device than the user intended. As such,
implementations should communicate this risk to the user.
</div>
<li>Let |ports| be the sequence of the {{SerialPort}}s
representing the ports in |availablePorts|.
</li>
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