对象属性和值的相等运算符

Question

伙计们，所以我在js中遇到了一些意外行为...我不知道为什么会这样...有人可以向我解释吗？谢谢

campaign = {
  "ppmv_ref": "1324232571",
  "type": "value off",
  "title": "20% off the weed item",
  "percentage": "20",
  "product": "weed",
  "productId": "46482649",
  "quantity": "50",
  "startDate": "10/22/2018",
  "expirationDate": "10/23/2018",
  "couponFlag": "true",
  "active": "true"
}
condition = campaign.active === true;

console.log(campaign.active)// logs true
console.log(condition); // logs false

Answer 1

因为您要将字符串与布尔值进行比较。

+------------------------+
| 16 Years and 1 Months. |
+------------------------+

此评估为false，您可以用引号将true换行，这将评估为true。

Answer 2

因为campaign.active === true 存储字符串“ true”。因此，您应该使用： campaign.active