As you may be aware, let is a new keyword in ECMAScript 6. While let works very much like var, there is one major difference. This article (a quick one) explains the difference between these two ...

var is the oldest variable declaration keyword in JavaScript. Variables declared with var have function scope or global scope. They are hoisted to the top of their scope, which means they can be ...

[In case you don't know, in ECMAScript/JavaScript, variables declared with var have global or function-level scope, and variables declared with let have block-level scope.] Lately all the code ...