JavaScript Object.keys returning empty array

Question

I'm trying to get the keys from a JavaScript Object. When I inspect the object I can see that there is a key value pair on the object but when I run Object.keys(myObject) I get an empty array returned. What am I doing wrong?

I'm following this documentation here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys

And the function which creates the object is as follows:

query: function () {
  var query = {}
  _.each(this.$el.find('input:checked'), function (el, index) {
    Object.defineProperty(query, el.id, {value: el.value})
  })
  return query
}

Object.keys only returns enumerable own keys. Try Object.getOwnPropertyNames. — Benjamin Gruenbaum
– Benjamin Gruenbaum, Commented Nov 5, 2015 at 18:10
OMG thanks. you saved me a whole lot of pain & head scratching — Linda Keating
– Linda Keating, Commented Nov 5, 2015 at 18:14

Benjamin Gruenbaum · Accepted Answer · 2015-11-05 18:15:18Z

20

Object.keys only returns enumerable own keys. Try Object.getOwnPropertyNames.

answered Nov 5, 2015 at 18:15

Benjamin Gruenbaum

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Divyanth Jayaraj · Accepted Answer · 2015-11-05 18:15:37Z

7

Console.log prints the most recent value of its contents and not the value of that content at that specific time of execution.

To log the array, try deep-cloning its value to another variable and then console log it.

 console.log(JSON.parse(JSON.stringify(keys)));

answered Nov 5, 2015 at 18:15

Divyanth Jayaraj

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1 Comment

Puka Over a year ago

This answer deserves way more credit. Thank you so much!

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