javascript - Condition not resolving correctly

Question

I have this condition in Javascript:

const isObject = (typeof item.data.data[field] == "object" || typeof masterRecord.data.data[field] == "object") && item.data.data[field] != null;

If I use Chrome devTools to step through the code, isObject resolves as true, but this is not correct.

If I insert a breakpoint at the specific line and break down the conditions into its parts, I get the following values:

• typeof item.data.data[field] == "object" -> false
• typeof masterRecord.data.data[field] == "object" -> false
• (typeof item.data.data[field] == "object" || typeof masterRecord.data.data[field] == "object") -> false
• item.data.data[field] != null -> true

...and finally, the condition as a whole, with its correct output:

• (typeof item.data.data[field] == "object" || typeof masterRecord.data.data[field] == "object") && item.data.data[field] != null -> false

Ideas?

Answer 1

等待大神答复