I need to pass a value as a string and not an array from inside an event listener to a global variable. Currently when the page loads, I check for a cookie inside the event listener and pass that value (‘de’, ‘es’, ‘en’ etc) to an empty array. I don’t know a better wa…
Tag: hoisting
Hoisting inside function – inner function and variable having same name – Output?
Not able to get this function execution. Can someone explain? Answer Function and variable declarations are hoisted. Function declarations also hoist the assignment of the value. So both function x and var x create a variable named x in the current scope. function x also assigns a function to that variable. A…
In the block scope even after initialisation with undefined var type of variable logs out unexpected value
But when I not initialise the ‘x’ manually which is inside the ‘if-statement’, it initialise with undefined and hoisted to the top and should log the most recent value which is undefined , as 20 is logs out in the above example. But it logs out 10.Why? Answer From MDN – var: Dupl…
Variable Hoisting in Javascript List of Adders
I have learned the basics of variable hoisting in JavaScript, and am now trying to enhance it by doing some exercises. I’ve come across this piece of code: This code first creates an array of functions from a given list. Each function adds the same passed number (in this case 100) to a particular value …
Does automatically hoisting slow down the performance of JavaScript?
Lately, I was studying Scope in Javascript. I want to know whether automatically hoisting is done at compile time or at the time of executing the code(run time). If it does at run time then I have another question does auto-hoisting will slow down the performance of the Javascript program. Should we use manua…