Temporal Dead Zone (TDZ) demystified - JS RocksA collaborative website about the latest JavaScript features and tools. The Temporal Dead Zone refers to a new set of ECMAScript semantics regarding scope, introduced in ES2015 (aka ES6). Although the name may sound a bit intimidating, the concept is not hard to grasp, actually. But first, let's take one step back and look at how scoping works in ES5: var x = 'outer scope'; (function() { console.l
