JSfuck

JSFuck is an esoteric subset of JavaScript, where code is written using only six characters: [, ], (, ), !, and +

It will work with any compiler of JS, but its not recomended to use in a professional enviroment.

It works as follows: with these six characters you are able to create diferent types of values, beacause the wired conversion of types when you try to operate with diferent ones

then you are able to convert everything to string by adding +[], and then with square brackets you are able to select a character from it

at the end, you want to build your code as an string character by character and then use some type of eval() to execure everything

jsfuck.com
wikipedia.org/wiki/JSFuck

[ ] ( ) ! +


values you can get

values representation
false ![]
true !![]
0 +[]
1 +!![]
2 !![]+!![]
10 +( [+!![]] + [+![]] )
NaN +{}
undefined [][[]]

strings you can get

"NaN" +{}+[]
"[object Object]" {}+[]
"true" !![]+[]
"false" ![]+[]
"undefined" [][[]]+[]
"<font color="undefined"></font>" ([]+[])["fontcolor"]()
"function flat() { [native code] }" []["flat"]+[]
"[object Array Iterator]" []["entries"]()+[]

type transformations

x.toString() x+[]
parseInt(x) +(x)

Js types

strings,numbers,booleans,arrays,objects

Constructor

[]["filter"]["constructor"]( CODE )()

[][
    (![]+[])[+![]]
    +
    ([][[]]+[])[!![]+!![]+![]+!![]+!![]+!![]]
    +
    (![]+[])[!![]+!![]]
    +
    (!![]+[])[+![]]
    +
    (!![]+[])[!![]+!![]+!![]]
    +
    (!![]+[])[+!![]]
    ][
    ([][(![]+[])[+![]]+(![]+[])[!![]+!![]]+(![]+[])[+!![]]+(!![]+[])[+![]]]+[])[!![]+!![]+!![]]
      +
      ([][  (!![]+[])[ !![] + !![] + !![]]+  ([][[]]+[])[+!![]]+  (!![]+[])[+![]]+  (!![]+[])[+!![]]+  ([][[]]+[])[!![] +!![]+!![]+!![]+!![]]+  (!![]+[])[!![] +!![] +!![]]+(![]+[])[!![] +!![] +!![]]]()+[])[+!![]]
      +
      ([][[]]+[])[+!![]]
      +
      (![]+[])[!![]+!![]+!![]]
      +
      (!![]+[])[+![]]
      +
      (!![]+[])[+!![]]
      +
      ([][[]]+[])[+![]]
      +
      ([][(![]+[])[+![]]+(![]+[])[!![]+!![]]+(![]+[])[+!![]]+(!![]+[])[+![]]]+[])[!![]+!![]+!![]]
      +
      (!![]+[])[+![]]
      +
      ([][  (!![]+[])[ !![] + !![] + !![]]+  ([][[]]+[])[+!![]]+  (!![]+[])[+![]]+  (!![]+[])[+!![]]+  ([][[]]+[])[!![] +!![]+!![]+!![]+!![]]+  (!![]+[])[!![] +!![] +!![]]+(![]+[])[!![] +!![] +!![]]]()+[])[+!![]]
      +
      (!![]+[])[+!![]]
    ]("console.log(1)")()