I have a question about the isPlainObject method.

[ajiho]

In lodash, the following three cases all return true,

_.isPlainObject({ x: 0, y: 0 }) // true
_.isPlainObject(Object.create(null))  //true
_.isPlainObject(new Object()) //true

but in is-what it’s different.

d.isPlainObject({ x: 0, y: 0 }) //true
d.isPlainObject(Object.create(null)) //false
d.isPlainObject(new Object()) // true

So, is this difference intentional by design, or is it a bug?

Here are some new findings: jQuery and Lodash behave consistently.

$.isPlainObject({ x: 0, y: 0 }) // true
$.isPlainObject(Object.create(null)) //true
$.isPlainObject(new Object()) //true

[mesqueeb]

It's like a question without a right answer. If you see an object without prototype, do you consider that a plain object or not? 🤔🫠

[ajiho]

As you said, this is indeed a question without a definitive answer. Maybe it’s better to stay consistent with them? After all, they’ve kept this behavior for quite a long time, and users have probably gotten used to it. That said, it doesn’t necessarily mean Lodash and jQuery are absolutely correct. But in any case, I’ll follow your decision.