Question

97

Check if Object is empty with JavaScript/jQuery

rated 0 times [ 100] [ 3] / answers: 1 / hits: 85139 / 12 Years ago, thu, december 20, 2012, 12:00:00

I have an object like this:

ricHistory = {

  name1: [{

    test1: value1,

    test2: value2,

    test3: value3

  }],

  name2: [{

    test1: value1,

    test2: value2,

    test3: value3

  }]

};

Now I want to check if e.g. name2 is empty with Javascript/jQuery. I know the method hasOwnProperty. It work for data.hasOwnProperty('name2') only if the name exists or not, but I have to check if its empty.

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jennie

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answered 12 Years ago alexander · Accepted Answer

Try this:

if (ricHistory.name2 && 

    ricHistory.name2 instanceof Array &&

    !ricHistory.name2.length) {

   console.log('name2 is empty array');

} else {

   console.log('name2 does not exists or is not an empty array.');

}

The solution above will show you whether richHistory.name2 exists, is an array and it's not empty.