JavaScript Variable Scope: Understanding `let` versus `var`
Hoisting Behavior with varWhen using var, declarations are hoisted to the top of their scope, but initializations remain in place. This often leads to unexpected undefined values in function scopes.var globalId = 100;
processId();
console.log(globalId); // 100
function processId() {
console.log(globalId); // undefined (local declaration hoist ...
Posted on Sun, 21 Jun 2026 17:11:42 +0000 by Jimmy79