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Add [Exposed=*] to expose on all globals #526

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Nov 2, 2021
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Add [Exposed=*] to expose on all globals #526

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Add [Exposed=*] to expose on all globals
littledan Feb 22, 2018
aa3e328
fixup! Add [Exposed=*] to expose on all globals
Ms2ger Oct 1, 2021
bde135a
Update index.bs
Ms2ger Oct 1, 2021
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46 changes: 40 additions & 6 deletions index.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -7002,6 +7002,17 @@ which form (or forms) it is in:
<code>[Exposed=(Window,Worker)]</code>
</td>
</tr>
<tr>
<td>
<emu-nt><a href="#prod-ExtendedAttributeWildcard">ExtendedAttributeWildcard</a></emu-nt>
</td>
<td>
<dfn id="dfn-xattr-wildcard" for="extended attribute" export>takes a wildcard</dfn>
</td>
<td>
<code>[Exposed=*]</code>
</td>
</tr>

</table>

Expand Down Expand Up @@ -7063,6 +7074,7 @@ five forms are allowed.
"="
"&gt;"
"?"
"*"
"ByteString"
"DOMString"
"FrozenArray"
Expand Down Expand Up @@ -7127,6 +7139,11 @@ five forms are allowed.
identifier "=" identifier
</pre>

<pre class="grammar" id="prod-ExtendedAttributeWildcard">
ExtendedAttributeWildcard :
identifier "=" "*"
</pre>

<pre class="grammar" id="prod-ExtendedAttributeIdentList">
ExtendedAttributeIdentList :
identifier "=" "(" IdentifierList ")"
Expand Down Expand Up @@ -9588,14 +9605,31 @@ it indicates that the construct is exposed
on that particular set of global interfaces.

The [{{Exposed}}] [=extended attribute=] must either
[=takes an identifier|take an identifier=] or
[=takes an identifier list|take an identifier list=].
Each of the identifiers mentioned must be a [=global name=] and be unique.
This list of identifiers is known as the construct's
<dfn>own exposure set</dfn>.
[=takes an identifier|take an identifier=],
[=takes an identifier list|take an identifier list=] or
[=takes a wildcard|take a wildcard=].
Each of the identifiers mentioned must be a [=global name=] of some [=interface=] and be unique.

<div algorithm>
The <dfn>own exposure set</dfn> is the [=/set=] of identifiers defined as follows:

<dl class="switch">
: If the [{{Exposed}}] [=extended attribute=] [=takes an identifier=] |I|
:: The [=own exposure set=] is the [=/set=] « |I| ».
: If the [{{Exposed}}] [=extended attribute=] [=takes an identifier list=] |I|
:: The [=own exposure set=] is the [=/set=] |I|.
: If the [{{Exposed}}] [=extended attribute=] [=takes a wildcard=]
:: The [=own exposure set=] is the [=/set=] of [=global names=] of [=interfaces=] which have the
[{{Global}}] [=extended attribute=].
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</dl>

<p class="advisement">
<code>[Exposed=*]</code> is to be used with care.
It is only appropriate when an API does not expose significant new capabilities.
If the API might be restricted or disabled in some environments,
it is preferred to list the globals explicitly.
</p>

<div algorithm>
To get the <dfn id="dfn-exposure-set" export>exposure set</dfn> of a construct |C|,
run the following steps:

Expand Down