Which values in JavaScript are considered falsy when converted to a boolean?

In JavaScript, the following values are considered falsy when converted to a boolean:

• 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 is falsy');
}

if (!"") {
  console.log('Empty string is falsy');
}

if (!null) {
  console.log('null is falsy');
}

This is important to consider when checking conditions and logical expressions.