How to handle empty object in if statement as false? [duplicate]

Question

I ran across this case today

if ({}) {
  // This is returned as empty object is true
}

therefore need to figure out a way where {} is false, tried calling .length on an object I pass to the if statement, but that doesn't work.

I'm not sure what you're asking. If you want to find out if an object has no properties, use Object.keys. — John Dvorak
– John Dvorak, Commented Jul 4, 2016 at 11:16
You sort of have to define what "empty object" means. That is has no own keys...? — deceze
– deceze ♦, Commented Jul 4, 2016 at 11:16

Mohammad Usman · Accepted Answer · 2016-07-04 11:17:07Z

8

You can use Object.keys() method to achieve this.

From Mozilla's Documentation:

The Object.keys() method returns an array of a given object's own enumerable properties, in the same order as that provided by a for...in loop (the difference being that a for-in loop enumerates properties in the prototype chain as well).

if (Object.keys({}).length) {
  console.log('Object is not Empty');
} else {
  console.log('Object is Empty');
}

console.log(Object.keys({}).length);

answered Jul 4, 2016 at 11:17

Mohammad Usman

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Rahul Tripathi · Accepted Answer · 2016-07-04 11:16:58Z

2

You can try to use:

Object.keys(obj).length === 0;

answered Jul 4, 2016 at 11:16

Rahul Tripathi

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1 Comment

user6445533 Over a year ago

You need to check for Symbols too

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