What values are considered falsy in JavaScript?

In JavaScript, falsy values are those that become false when converted to a boolean. They include:

• false
• 0 (zero)
• -0 (negative zero)
• 0n (BigInt zero)
• "" (empty string)
• null
• undefined
• NaN

All other values are considered truthy.

Example:

if (!0) {
  console.log('0 — falsy value');
}
if ("hello") {
  console.log('"hello" — truthy value');
}