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ASCII And ANSI Escape Sequences: `key-code`

Returns character sequences for any key pressed (ie sent from the terminal)

Description

key-code is a tool used for querying what byte sequence the terminal emulator

key-code -> <stdout>

<stdin> -> key-code -> <stdout>

» key-code
Press any key to print its escape constants...

…then press [f9] and key-code returns…

ANSI Constants:   {F9}
Byte Sequence:    %[27 91 50 48 126]
Contains Unicode: false

» tout str '{ESC}[20~' -> key-code
ANSI Constants:   {F9}
Byte Sequence:    %[27 91 50 48 126]
Contains Unicode: false

If stdout is not a TTY then only the thing written is the ANSI Constant. This is so that it can be used as a variable. eg

key-code -> set $key

event onKeyPress close=$key {
    exit
}