<s>
Web	B-Protocol
IDL	I-Protocol
is	O
an	O
interface	B-General_Concept
description	I-General_Concept
language	I-General_Concept
(	O
IDL	B-Language
)	O
format	O
for	O
describing	O
application	B-Application
programming	I-Application
interfaces	I-Application
(	O
APIs	B-Application
)	O
that	O
are	O
intended	O
to	O
be	O
implemented	O
in	O
web	O
browsers	O
.	O
</s>
<s>
Its	O
adoption	O
was	O
motivated	O
by	O
the	O
desire	O
to	O
improve	O
the	O
interoperability	O
of	O
web	O
programming	B-Application
interfaces	I-Application
by	O
specifying	O
how	O
languages	O
such	O
as	O
ECMAScript	B-Language
should	O
bind	O
these	O
interfaces	O
.	O
</s>
<s>
Web	B-Protocol
IDL	I-Protocol
is	O
an	O
IDL	B-Language
variant	O
with	O
:	O
</s>
<s>
A	O
mapping	O
of	O
how	O
interfaces	O
described	O
with	O
Web	B-Protocol
IDL	I-Protocol
correspond	O
to	O
language	O
constructs	O
within	O
an	O
ECMAScript	B-Language
execution	O
environment	O
.	O
</s>
<s>
Web	O
specifications	O
had	O
been	O
specified	O
using	O
OMG	O
IDL	B-Language
since	O
1998	O
,	O
first	O
with	O
the	O
DOM	O
Level	O
1	O
specification	O
.	O
</s>
<s>
However	O
,	O
interfaces	O
defined	O
using	O
OMG	O
IDL	B-Language
were	O
not	O
able	O
to	O
specify	O
behavior	O
for	O
JavaScript	O
precisely	O
,	O
leading	O
to	O
issues	O
with	O
interoperability	O
.	O
</s>
<s>
WebIDL	B-Protocol
improved	O
on	O
this	O
status	O
quo	O
by	O
providing	O
data	O
types	O
and	O
binding	O
specifications	O
that	O
make	O
the	O
intended	O
behavior	O
in	O
JavaScript	O
clearer	O
.	O
</s>
<s>
The	O
W3C	O
Wiki	O
has	O
a	O
list	O
of	O
W3C	O
Specifications	O
that	O
use	O
Web	B-Protocol
IDL	I-Protocol
,	O
and	O
nearly	O
all	O
WHATWG	B-Language
specifications	O
use	O
it	O
.	O
</s>
<s>
The	O
Chromium	B-Language
Project	I-Language
has	O
a	O
page	O
about	O
using	O
WebIDL	B-Protocol
to	O
specify	O
interfaces	O
in	O
Blink	B-Language
.	O
</s>
<s>
Mozilla	O
uses	O
Web	B-Protocol
IDL	I-Protocol
in	O
their	O
software	O
creation	O
process	O
,	O
mapping	O
implementations	O
to	O
Web	B-Protocol
IDL	I-Protocol
specs	O
.	O
</s>
<s>
When	O
WebKit	B-Language
is	O
built	O
,	O
the	O
IDL	B-Language
files	O
are	O
parsed	O
,	O
creates	O
the	O
code	O
to	O
bind	O
interfaces	O
to	O
implementations	O
.	O
</s>
<s>
In	O
the	O
ES	O
operating	O
system	O
,	O
every	O
system	O
API	B-Application
is	O
defined	O
in	O
Web	B-Protocol
IDL	I-Protocol
,	O
and	O
can	O
be	O
invoked	O
from	O
JavaScript	O
directly	O
.	O
</s>
