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| This Lua module is used on
approximately 306,000 pages, or roughly 1% of all pages
.
To avoid major disruption and server load, any changes should be tested in the module's
/sandbox
or
/testcases
subpages, or in your own
module sandbox
. The tested changes can be added to this page in a single edit. Consider discussing changes on the
talk page
before implementing them.
|
| This module depends on the following other modules:
|
This module implements
{{
If preview
}}
and
{{
Preview warning
}}
. It helps templates/modules determine if they are being previewed.
Prefer implementing the template versions in other templates.
In a module to use the
main()
, you need to pass a frame table with an args table.
For the preview warning, use
_warning()
.
local
p
=
{}
local
cfg
=
mw
.
loadData
(
'Module:If preview/configuration'
)
--[[
main
This function returns either the first argument or second argument passed to
this module, depending on whether the page is being previewed.
]]
function
p
.
main
(
frame
)
if
cfg
.
preview
then
return
frame
.
args
[
1
]
or
''
else
return
frame
.
args
[
2
]
or
''
end
end
--[[
pmain
This function returns either the first argument or second argument passed to
this module's parent (i.e. template using this module), depending on whether it
is being previewed.
]]
function
p
.
pmain
(
frame
)
return
p
.
main
(
frame
:
getParent
())
end
local
function
warning_text
(
warning
)
return
mw
.
ustring
.
format
(
cfg
.
warning_infrastructure
,
cfg
.
templatestyles
,
warning
)
end
function
p
.
_warning
(
args
)
local
warning
=
args
[
1
]
and
args
[
1
]:
match
(
'^%s*(.-)%s*$'
)
or
''
if
warning
==
''
then
return
warning_text
(
cfg
.
missing_warning
)
end
if
not
cfg
.
preview
then
return
''
end
return
warning_text
(
warning
)
end
--[[
warning
This function returns a "preview warning", which is the first argument marked
up with HTML and some supporting text, depending on whether the page is being previewed.
disabled since we'll implement the template version in general
]]
--function p.warning(frame)
-- return p._warning(frame.args)
--end
--[[
warning, but for pass-through templates like {{preview warning}}
]]
function
p
.
pwarning
(
frame
)
return
p
.
_warning
(
frame
:
getParent
().
args
)
end
return
p