warning
no-varDiscourage using 'var' for creating variables - require using let/const instead
Examples
❌ Incorrect
var count = posts.length;
✅ Correct
const count1 = posts.length;
// or, if the value can be changed
let count2 = posts.length;
if (additionalPosts.length) {
count2 += additionalPosts.length;
}