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Below stolen shamelessly from the MediaWiki Scribunto articles

Examples

Invoking module directly

Given Module:Test with the following contents:

local p = {}
function p.main(frame)
   local args = frame.args
   mw.log("log test")
   return args[1]..args["sep"]..args[2]
end
return p

The following invoke call: {{#invoke:Test|a|sep=;|b}} Can be simulated accurately with the following code in the debug console:

=p.main(
   mw.getCurrentFrame():newChild{
      title="Module:Test",
      args={"a",["sep"]=";","b"}
   }
)

Note that in this example the element in the export table which is being evaluated is called "main".

Simplified version

If the module you are debugging does not use any frame object methods (such as frame:preprocess()), like the example above, then the frame object analog(?) does not have to be complete, and the debugging code can be simplified into the following:

=p.main{
   args={"a",["sep"]=";","b"}
}

What's a sandbox  Yamato

Base Health Stats
Hero Starting Added per Boon At Max Boon
 Abrams 800 +49 2515
 Apollo 770 +45 2345
 Bebop 880 +52 2700
 Billy 820 +53 2675
 Calico 730 +37 2025
 Celeste 690 +33 1845
 The Doorman 755 +42 2225
 Drifter 755 +41 2190
 Dynamo 880 +61 3015
 Graves 730 +33 1885
 Grey Talon 780 +38 2110
 Haze 730 +33 1885
 Holliday 780 +41 2215
 Infernus 830 +39 2195
 Ivy 755 +45 2330
 Kelvin 880 +60 2980
 Lady Geist 880 +51 2665
 Lash 780 +50 2530
 McGinnis 780 +52 2600
 Mina 660 +27 1605
 Mirage 730 +45 2305
 Mo & Krill 930 +65 3205
 Paige 680 +31 1765
 Paradox 730 +46 2340
 Pocket 780 +36 2040
 Rem 680 +28 1660
 Seven 730 +41 2165
 Shiv 830 +46 2440
 Silver 830 +28 1810
 Silver (Transformed) 830 +28 1810
 Sinclair 730 +38 2060
 Venator 820 +43 2325
 Victor 800 +34 1990
 Vindicta 755 +28 1735
 Viscous 780 +45 2355
 Vyper 780 +35 2005
 Warden 805 +60 2905
 Wraith 730 +35 1955
 Yamato 730 +45 2305

   

Item Cost +X% Bullet Lifesteal

Use this for the debug console when testing the ItemsByStat page: =p.tablefy( mw.getCurrentFrame():newChild{ title="Module:ItemsByStat", args={"BulletLifestealPercent", "+X% Bullet Lifesteal", "%"} })