<s>
Google	B-Application
Apps	I-Application
Script	I-Application
is	O
a	O
scripting	B-Language
platform	O
developed	O
by	O
Google	B-Application
for	O
light-weight	O
application	O
development	O
in	O
the	B-Application
Google	I-Application
Workspace	O
platform	O
.	O
</s>
<s>
Google	B-Application
Apps	I-Application
Script	I-Application
was	O
initially	O
developed	O
by	O
Mike	O
Harm	O
as	O
a	O
side	O
project	O
while	O
working	O
as	O
a	O
developer	O
on	O
Google	B-Application
Sheets	O
.	O
</s>
<s>
Google	B-Application
Apps	I-Application
Script	I-Application
was	O
first	O
publicly	O
announced	O
in	O
May	O
2009	O
when	O
a	O
beta	O
testing	O
program	O
was	O
announced	O
by	O
Jonathan	O
Rochelle	O
,	O
then	O
Product	O
Manager	O
for	O
Google	B-Application
Docs	O
.	O
</s>
<s>
In	O
August	O
2009	O
Google	B-Application
Apps	I-Application
Script	I-Application
was	O
subsequently	O
made	O
available	O
to	O
all	O
Google	B-Application
Apps	I-Application
Premier	O
and	O
Education	O
Edition	O
customers	O
.	O
</s>
<s>
It	O
is	O
based	O
on	O
JavaScript	B-Language
1.6	I-Language
,	O
but	O
also	O
includes	O
some	O
portions	O
of	O
1.7	O
and	O
1.8	O
and	O
a	O
subset	O
of	O
the	O
ECMAScript	B-Language
5	O
API	O
.	O
</s>
<s>
Apps	B-Application
Script	I-Application
projects	O
run	O
server-side	B-Application
on	O
Google	B-Application
's	I-Application
infrastructure	O
.	O
</s>
<s>
According	O
to	O
Google	B-Application
,	O
Apps	B-Application
Script	I-Application
"	O
provides	O
easy	O
ways	O
to	O
automate	O
tasks	O
across	O
Google	B-Application
products	O
and	O
third	O
party	O
services.	O
"	O
</s>
<s>
Apps	B-Application
Script	I-Application
is	O
also	O
the	O
tool	O
that	O
powers	O
the	O
add-ons	O
for	O
Google	B-Application
Docs	O
,	O
Sheets	O
and	O
Slides	O
.	O
</s>
<s>
Google	B-Application
Apps	I-Application
Script	I-Application
is	O
based	O
on	O
JavaScript	B-Language
1.6	I-Language
and	O
a	O
selection	O
of	O
JavaScript	B-Language
1.7	I-Language
and	O
1.8	O
.	O
</s>
<s>
It	O
features	O
a	O
cloud-based	O
debugger	B-Application
for	O
debugging	O
App	O
Scripts	O
in	O
the	O
web	O
browser	O
.	O
</s>
<s>
Google	B-Application
Apps	I-Application
Script	I-Application
has	O
some	O
processing	O
limitations	O
.	O
</s>
<s>
As	O
a	O
cloud-based	O
service	O
,	O
Apps	B-Application
Script	I-Application
limits	O
the	O
time	O
that	O
a	O
user	O
's	O
script	O
may	O
run	O
,	O
as	O
well	O
as	O
limiting	O
access	O
to	O
Google	B-Application
services	O
.	O
</s>
<s>
Currently	O
,	O
Google	B-Application
Apps	I-Application
Store	O
does	O
not	O
allow	O
direct	O
connection	O
to	O
internal	O
(	O
behind-the-firewall	O
)	O
corporate	O
databases	O
,	O
which	O
is	O
key	O
to	O
building	O
business	O
apps	O
.	O
</s>
<s>
However	O
,	O
this	O
can	O
be	O
overcome	O
via	O
the	O
use	O
of	O
the	O
JDBC	O
service	O
if	O
connections	O
are	O
allowed	O
from	O
Google	B-Application
servers	O
to	O
the	O
internal	O
database	O
server	O
.	O
</s>
<s>
Due	O
to	O
the	O
cloud	O
nature	O
of	O
Apps	B-Application
Script	I-Application
,	O
functions	O
related	O
to	O
date	O
and	O
time	O
will	O
produce	O
results	O
that	O
seem	O
to	O
be	O
incorrect	O
due	O
to	O
the	O
data	O
crossing	O
time	B-Device
zones	I-Device
.	O
</s>
<s>
In	O
March	O
2014	O
,	O
Google	B-Application
introduced	O
add-ons	O
for	O
Docs	O
and	O
Sheets	O
(	O
soon	O
followed	O
by	O
Forms	O
)	O
.	O
</s>
<s>
The	O
add-on	O
stores	O
let	O
users	O
add	O
extra	O
features	O
to	O
Google	B-Application
editors	O
,	O
such	O
as	O
mail-merging	O
,	O
workflows	O
,	O
and	O
diagrams	O
builders	O
.	O
</s>
<s>
All	O
add-ons	O
are	O
either	O
100%	O
built	O
with	O
Apps	B-Application
Script	I-Application
or	O
simply	O
use	O
Apps	B-Application
Script	I-Application
to	O
display	O
a	O
UI	O
in	O
the	B-Application
Google	I-Application
editors	O
while	O
relying	O
on	O
an	O
external	O
back-end	O
to	O
perform	O
some	O
tasks	O
.	O
</s>
<s>
For	O
example	O
,	O
MailChimp	O
,	O
a	O
mail-merging	O
tool	O
,	O
has	O
an	O
add-on	O
for	O
Google	B-Application
Docs	O
that	O
communicates	O
with	O
MailChimp	O
platform	O
to	O
send	O
emails	O
.	O
</s>
<s>
Before	O
add-ons	O
,	O
it	O
was	O
possible	O
to	O
publish	O
scripts	O
for	O
Google	B-Application
Sheets	O
in	O
the	O
Script	O
Gallery	O
.	O
</s>
<s>
When	O
users	O
installed	O
scripts	O
through	O
this	O
gallery	O
,	O
a	O
copy	O
of	O
the	O
Apps	B-Application
Script	I-Application
code	O
was	O
installed	O
on	O
the	O
user	O
's	O
Sheet	O
.	O
</s>
<s>
This	O
new	O
approach	O
makes	O
it	O
easier	O
to	O
support	O
existing	O
code	O
and	O
helped	O
convince	O
several	O
companies	O
,	O
such	O
as	O
MailChimp	O
or	O
LucidChart	O
to	O
invest	O
in	O
Apps	B-Application
Script	I-Application
.	O
</s>
<s>
As	O
part	O
of	O
the	O
add-ons	O
release	O
,	O
Google	B-Application
also	O
introduced	O
a	O
UI	O
Style	O
Guide	O
and	O
CSS	O
package	O
to	O
help	O
developers	O
built	O
add-ons	O
that	O
integrate	O
smoothly	O
into	O
the	O
editors	O
.	O
</s>
<s>
Each	O
add-on	O
is	O
also	O
reviewed	O
by	O
Google	B-Application
before	O
its	O
publication	O
and	O
developers	O
can	O
benefit	O
from	O
advice	O
from	O
Googlers	B-Application
to	O
provide	O
a	O
better	O
user	O
experience	O
.	O
</s>
