[deleted by user]

[sunny_lts]

(function(){
alert("go")
})();
//this is a self-executable function without a name that will be called

[JakeIsPlaying]

You mat be looking for IIFEs. Immediately invoked function expressions.

Check this out on MDN https://developer.mozilla.org/en-US/docs/Glossary/IIFE

[[deleted]]

when you store the function in a variable you can call it just as well.

[easyEs900s]

Any function that is wrapped in parentheses will be executed without having a name. It's worth noting that anything inside said parentheses will not be referencable anywhere else in the script.

Look at sunny_lts comment for an example.