closure example
const add = (function () {
let counter = 0;
return function () {counter += 1; return counter}
})();
add();
add();
add();
// the counter is now 3closure example
const add = (function () {
let counter = 0;
return function () {counter += 1; return counter}
})();
add();
add();
add();
// the counter is now 3what is closure in javascript
function OuterFunction() {
var outerVariable = 100;
function InnerFunction() {
alert(outerVariable);
}
return InnerFunction;
}
var innerFunc = OuterFunction();JavaScript - Closures
function makeAdder(x) {
return function(y) {
return x + y;
};
}
var add5 = makeAdder(5);
var add10 = makeAdder(10);
console.log(add5(2)); // 7
console.log(add10(2)); // 12
//=====
//add5 and add10 are both closures.
//They share the same function body definition, but store different lexical environments.
//In add5's lexical environment, x is 5, while in the lexical environment for add10, x is 10.what is a closure in javascript
//Closures are the inner functions that are embedded in parent function
function getName(){
// print name function is the closure since it is child function of getName
function printName(){
return 'Kevin'
}
// return our function definition
return printName;
}
const checkNames = getName();
console.log(checkNames());Copyright © 2021 Codeinu
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