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Tenho que fazer uma função chamada isNull que recebe um parâmetro chamado val e retorna um boolean indicando se é nulo; como faço?

enter image description here

null    => true
0       => false
1       => false
''      => false
about 4 years ago · Juan Pablo Isaza
1 answers
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0

Dentro da função você retorna a comparação do valor da variável passado por parâmetro com o valor null. O resultado desse teste é um valor boolean.

function isNull(val) {
  return val === null
}
about 4 years ago · Juan Pablo Isaza Report
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