javascript - 为什么对象不正确？

Question

如果检查，为什么 Object 不正确consumer == true？

let consumer = {
  "checked": true,
  "ID": "680e543457-999fc-11e6",
  "fio": "John Doe",
  "office": {
    "ID": "fgh4d"
  },
  "phone": ""
};

console.log('consumer  == true', consumer == true); // false
console.log('consumer  === true', consumer === true); // false
console.log('Boolean(consumer)', Boolean(consumer));  // true
console.log('!consumer', !consumer); // false
if (consumer) console.log('1') // 1

标签： javascript

Answer 1

除了@VLAZ 答案，您还可以检查消费者对象是否未定义，这会导致布尔表达式。

let consumer = {
  "checked": true,
  "ID": "680e543457-999fc-11e6",
  "fio": "John Doe",
  "office": {
     "ID": "fgh4d"
  },
  "phone": ""
};

console.log('consumer  != undefined', consumer != undefined); // true
console.log('consumer  !== undefined', consumer !== undefined); // true

*编辑：格式