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JavaScript Overview

Posted by vamosrope14
vamosrope14
14,932 Points

What does block-level scoping mean, especially in terms related to const?

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1 Answer

Steven Parker
Steven Parker
229,745 Points
Steven Parker
Steven Parker
229,745 Points

It may sound complicated but it just means the variable only exists in the block (between braces {}) where it is created.

For example:

if (true) {
  var globalscope = 1;
  const blockscope = 2;
}
console.log(globalscope);  // 1
console.log(blockscope);   // reference error: blockscope is undefined