js hoisting
/*Hoisting is JavaScript's default behavior of moving
all declarations to the top of the current scope (script or function).
Be carefull that only declaration gets hoisted NOT the initialitations*/
var x = 5;
alert("x is = "+x+". y is = "+y);//result => x is = 5. y is = undefined.
var y = 7;
/*
note that the code doesn't produce the error "y is not defined" like
it would if we would omit y. It executes but not in the way you would want.
*/function hoisting in js
console.log(functionBelow("Hello"));
function functionBelow(greet) {
return `${greet} world`;
}
console.log(functionBelow("Hi"));function hoisting in js
console.log(functionBelow("Hello"));
var functionBelow = function(greet) {
return `${greet} world`;
}
console.log(functionBelow("Hi"));How does javascript hoisting works?
console.log(num); // Returns 'undefined' from hoisted var declaration (not 6)
var num; // Declaration
num = 6; // InitializationCopyright © 2021 Codeinu
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