I want to make an if statement to check if an object is an empty object or not.
By empty object I mean if I do console.log(object) it prints out {}.
How do I do this?
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1possible duplicate of Is object empty?Blender– Blender2013-07-08 21:29:33 +00:00Commented Jul 8, 2013 at 21:29
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2 Answers
myObject = {}
if Object.keys(myObject).length == 0
# myObject is "empty"
else
# myObject is not "empty"
1 Comment
Gabriel S.
Object.keys is ES5 and will not work on IE < 9 (Fixed using ES5Shim)
This function might work for you :
is_empty = (obj) ->
return true if not obj? or obj.length is 0
return false if obj.length? and obj.length > 0
for key of obj
return false if Object.prototype.hasOwnProperty.call(obj,key)
return true
#Examples
console.log is_empty("") #true
console.log is_empty([]) #true
console.log is_empty({}) #true
console.log is_empty(length: 0, custom_property: []) #true
console.log is_empty("Hello") #false
console.log is_empty([1,2,3]) #false
console.log is_empty({foo: 1}) #false
console.log is_empty(length: 3, custom_property: [1,2,3]) #false
1 Comment
Cimm
Careful the object
{foo: undefined} will return true, not false as you might expect.