Check if an array is empty

Return true for an array without items.

JavaScript Version 1.0.0 · MIT · .md

function isEmptyArray(value) { return Array.isArray(value) && !value.length; }

Input & expected output

[]

true

The edge case

[
  "[email protected]"
]

false

Know the limits

• Non-arrays return false rather than throwing.

The function above is the implementation used by the lab. The lab validates JSON types and caps size before execution; include equivalent validation when accepting untrusted input in your application.

Keep exploring

• Clone an array — Create a new array without copying the objects inside it.
• Remove duplicate values — Keep the first occurrence of each value, in its original order.
• Flatten a nested array — Turn a nested array into one sequence of values.