Gibberish/JavaScript

Gibberish/JavaScript is a Gibberish derivative.

Escape sequence
See also completed list

Comment
${: anything}

Concatenate string program
${cat:}

Hello, World!
A "Hello, World!" program and quine:

Hello, World!

A slightly more elaborate "Hello, world!":

${echo:Hello, World!}

${alert:Hello, World!} palindrome version:

Hello, World!${:{$!dlroW ,olleH }:}

${set:teg}${calc:tes:"Hello, World!"//"!dlroW ,olleH":set:clac}${get:tes}$

99 bottles of beer
 ${calc:0: var a = " bottle"; var b = " of beer"; var c = " on the wall"; var d = "Take one down, pass it around,\n"; for(var e = 99, f = ""; e > 1; --e) { f += e + a + "s" + b + c + ",\n"; f += e + a + "s" + b + ".\n"; f += d; f += e - 1 + a + "s" + b + c + ".\n\n"; } }${get:0}$ 1 bottle of beer on the wall, 1 bottle of beer Take one down, pass it around, No bottles of beer on the wall.

Quine
${calc:0:(function(a,b){return a+String.fromCharCode(34)+a+String.fromCharCode(34,44,34)+b+String.fromCharCode(34)+b})("${calc:0:(function(a,b){return a+String.fromCharCode(34)+a+String.fromCharCode(34,44,34)+b+String.fromCharCode(34)+b})(",")}${get:0}")}${get:0}

${calc:0:"${calc:0:#@#.replace(/#@#/,unescape('%22$`$&$%27%22'))}${get:0}".replace(/#@#/,unescape('%22$`$&$%27%22'))}${get:0}

and shorter: ${recurcall:$${recurcall:$0}}

self interpreter
${calc:0:prompt("Input:")}${getf:0}

Fibonacci sequence
${calc:0:var a=0,b=1,c="",e;for(var d=0;d<60;++d){c+=b+" ";e=a+b;a=b;b=e}c}${get:0}

asterisks counter
${recurcall:$${recurcall:$0}$$@1$$;*}$@1$;

Oscillator
period 2: ${calc:0:(function(a,b,c,d){return a+String.fromCharCode(39)+b+String.fromCharCode(34)+a+String.fromCharCode(34,44,34)+b+String.fromCharCode(34,44,34)+c+String.fromCharCode(34,44,34)+d+String.fromCharCode(34)+c+String.fromCharCode(39)+d})("${calc:0:(","${calc:0:(function(a,b,c,d){return a+String.fromCharCode(39)+b+String.fromCharCode(34)+a+String.fromCharCode(34,44,34)+b+String.fromCharCode(34,44,34)+c+String.fromCharCode(34,44,34)+d+String.fromCharCode(34)+c+String.fromCharCode(39)+d})(",")}${get:0}$@1$;",")}${get:0}$@1$;")}${get:0}$@1$;

${recurcall:$${echo:$${recurcall:$0}$$@1$$;}$$@1$$;}$@1$;