text 可以（a == 1 && a == 2 && a == 3）评估为真吗？

Posted 2021-05-03

https://stackoverflow.com/questions/48270127/can-a-1-a-2-a-3-ever-evaluate-to-true

Can (a ==1 && a== 2 && a==3) ever evaluate to true?

const a = {
  i: 1,
  toString: function () {
    return a.i++;
  }
}

if(a == 1 && a == 2 && a == 3) {
  console.log('Hello World!');
}