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How is it possible to only use ()[]+! to make javascript code?
Ex: http://discogscounter.getfreehosting.co.uk/js-noalnum.php
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Updated on July 03, 2019. The dollar sign ($) and the underscore (_) characters are JavaScript identifiers, which just means that they identify an object in the same way a name would. The objects they identify include things such as variables, functions, properties, events, and objects.
(three dots in JavaScript) is called the Spread Syntax or Spread Operator. This allows an iterable such as an array expression or string to be expanded or an object expression to be expanded wherever placed. This is not specific to React. It is a JavaScript operator.
symbol is used to indicate whether the expression defined is false or not. For example, !( 5==4) would return true , since 5 is not equal to 4.
== is used for comparison between two variables irrespective of the datatype of variable. === is used for comparision between two variables but this will check strict type, which means it will check datatype and compare two values.
See Java/script: no alnum cheat sheets.
In short, various constructs yield NaN/undefined/window/etc. Stringify and index them to yield any string. Extract a property and call it to execute code.
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