Here's a Code Recipe to check if an object is empty or not. For newer browsers, you can use plain vanilla JS and use the new "Object.keys" 🍦 But ...
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A typical programming practice is to set your object variable as
undefinedat first, so that comparison becomes much simpler for that later in code. All you have to do is:The same holds true when you return a function value, return either a boolean or undefined as a falsy value to avoid trouble latter.
The real question is -- why would you ever want to check that an object is empty?
I've only used my isEmptyObj in sanitization code.
Cleaning out empty values from incoming data.
Hmm, I still can't figure out why you'd ever want to do that.
Surely you want to check the object for having some set of required and forbidden properties.
Checking for an empty object seems completely useless, because if you wanted an empty object you could just make one yourself.
And if you didn't want an empty object, that means that you want some object with some properties, in which case you can check for the properties that you want.
So, I still can't figure out why you'd ever want to check if an object is empty.
Excellent work Samantha.
I made the adjustment to my isObj func
Source Code at:
gist.github.com/funfunction/b4b418...
Update:
I posted a more comprehensive (fuzz) test and performance analysis here....
dev.to/functional_js/isobj-test-if...
wooo, thanks for sharing let me link it up in my code notes 👍
Great we can add this as helper function in our codebase.
I use this often
Nice, I like this! You wouldn't have this code somewhere, would you? -- I'd love to include it in my code notes. But no biggie if you don't, I can type it out too 😄
Sometimes it is necessary to check if an object is empty.
Thanks
Good Explanation !!
awesome! glad you found it helpful! thanks for reading my article 👏
thanks, its valuable info. As a beginner in java script, i think
let o = new object();
still an empty object. i got confused in the beginning.