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158

javascript says JSON object property is undefined although it's not

rated 0 times [ 161] [ 3] / answers: 1 / hits: 51804 / 7 Years ago, fri, june 23, 2017, 12:00:00

I have a json-object, which I print to the screen (using alert()-function):

alert(object);

Here is the result:

Then I want to print the value of the id to the screen:

    alert(object[id]);

The result is this:

As you can see, the value of key id is not(!!!) undefined.

What the hell is going on here?!

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eanskylerg

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2 Years ago

answered 7 Years ago mckenna · Accepted Answer

Looks like your json object is not really an object, it's a json string. in order to use it as an object you will need to use a deserialization function like JSON.parse(obj). Many frameworks have their own implementation for deserializing a JSON string.

When you try to do alert(obj) with a real object the result would be [object Object] or something like that