0%

javascript-clean-code

Posted on 2024-04-14 Edited on 2025-04-07 In javascript
Symbols count in article: 61 Reading time ≈ 1 mins.

Prefer `const` over `let` and `var`

Bad

var array = [1, 2, 3];
for (let num of array) {
  console.log(num);
}

Good

const array = [1, 2, 3];
for (const num of array) {
  console.log(num);
}

Note, If you access array by index, you can’t use const:

const array = [1, 2, 3];
for (let i = 0; i < array.length; i++) {
  console.log(array[i]);
}