Question

How to define global variable in JavaScript

Answer 1

let globalVar = "global var";
 
function f() {
  console.log(globalVar); 
}
 
f();


console.log(globalVar); 
 
 
 
 
     
     
/*
run:
 
"global var"
"global var"
     
*/

 

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Answer 2

function f() {
	window.globalVar = "global var";
  console.log(globalVar); 
}

f();

console.log(globalVar); 




    
    
/*
run:

"global var"
"global var"
    
*/

 

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