I'm struggling with understanding some code related to javascript and angularjs. I came across this line - !function(a,b,c){}(x,y,z) - and I can't make sense of it. It's something new to me and I would appreciate any help in clarifying its purpose. Thank you for your assistance!
!function (e, n, t) {
"use strict";
// code
}(window, angular, jQuery)
A clever technique to immediately execute an anonymous function is using the ! operator in front of it. This approach allows for the function to be evaluated as a function expression rather than a function statement, enabling it to be invoked right away. Other symbols like parenthesis or a plus sign could also achieve the same result.
For example, the following code snippets are equivalent:
(e,n,t) => { /** */ }(window, angular, jQuery);
and
(function (e,n,t) { /** */ })(window, angular, jQuery);
by wrapping them in parentheses to enforce evaluation as expressions.
In both cases, an anonymous function is defined and executed with the parameters window, angular, jQuery, which are then referred to as e,n,t within the function body.
It's worth noting that this syntax is not commonly recommended for writing functions.
simply instructs the javascript to skip over this particular function and
set it as undefined in this manner:
function Example(){
console.log('display something');}
The Output Would Display:
display something
However, If You Add an Exclamation Mark (!) Before The Function, The Outcome Would Be:
Example is not defined
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