Empty-Arrays-Falsy-In-Js

Empty Arrays and Objects Falsy in JS

Source: https://www.sitepoint.com/javascript-truthy-falsy/

Empty objects and arrays will return false when evaluated against a true or false.

let arr = [];
let obj = {};

if (!arr) { // evaluations as true
  console.log('Nothing Here');
} else {
  console.log('Something here');
}

console.log(arr)

if (!obj) { // evaluations as true
  console.log('Nothing Here');
} else {
  console.log('Something here');
}

console.log(obj)

// Something here
// []
// Something here
// {}

The following values are always falsy:

false
0 (zero)
-0 (minus zero)
0n (BigInt zero)
'', "", ```` (empty string)
null
undefined
NaN

Everything else is truthy. That includes:

'0' (a string containing a single zero)
'false' (a string containing the text “false”)
[] (an empty array)
{} (an empty object)
function(){} (an “empty” function)

#JavaScript