how do I nest a javascript object inside another one?

Question

I receive an error of 'mydoc.docMeta is undefined' when I try to do this:

var mydoc = {};
mydoc.docMeta.keyword = "somevalue";

What am I doing wrong?

bfavaretto · Accepted Answer · 2013-02-19 14:53:38Z

3

Since mydoc.docMeta is also an object, you have to define it first:

var mydoc = {};
mydoc.docMeta = {};
mydoc.docMeta.keyword = "somevalue";

Or just use a literal:

var mydoc = {
    docMeta : {
        keyword : "somevalue"
    }
};

answered Feb 19, 2013 at 14:53

bfavaretto

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Comments

canon · Accepted Answer · 2013-02-19 14:53:48Z

2

You have to nest one more level:

var mydoc = {
   docMeta: {
       keyword: "somevalue"
   }
}

answered Feb 19, 2013 at 14:53

canon

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Comments

David G · Accepted Answer · 2013-02-19 14:53:42Z

1

Do you want docMeta to be another object literal?

var mydoc = { docMeta: {} };

answered Feb 19, 2013 at 14:53

David G

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Comments

cernunnos · Accepted Answer · 2013-02-19 14:55:40Z

1

Try

var mydoc = {};
mydoc.docMeta = {
    keyword : "somevalue"
};

You are declaring mydoc as an object, but then you are trying to set an attribute of an attribute of an object, first you have to declare that attribute as an object as well

answered Feb 19, 2013 at 14:55

cernunnos

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