Block Scoping and Constants in JavaScript ES6: let and const
The let Declaration
Basic Usage
The let keyword introduces block-scoped variables. Unlike var, variables declared with let are not accessible outside their containing block.
// Example with var
{
var globalVar = 'leaks';
}
console.log(globalVar); // Outputs: leaks
// Example with let
{
let blockScoped = 'does not leak';
}
console.log(block ...
Posted on Sun, 10 May 2026 22:47:34 +0000 by Adam W