Comparing to null with double-equals

Compare a variable to null using two equal signs to check if it is null or undefined at the same time.

if (value === null || value === undefined) {
  // `value` is `null` or `undefined`
}
 
if (value == null) {
  // `value` is `null` or `undefined`
}

if (value === null || value === undefined) {
  // `value` is `null` or `undefined`
}
 
if (value == null) {
  // `value` is `null` or `undefined`
}

if (value === null || value === undefined) {
  // `value` is `null` or `undefined`
}
 
if (value == null) {
  // `value` is `null` or `undefined`
}

if (value === null || value === undefined) {
  // `value` is `null` or `undefined`
}
 
if (value == null) {
  // `value` is `null` or `undefined`
}

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