Set Value if variable is Not NaN.

[Kingslayer]

Hello Guys,
I am adding up a bunch of inputfields and i write the value into another Inputfield.
But this is only supposed to happen if all fields are filled. So i wanted to write the result only into the Inputfield if it’s not NaN.

I have everything set up but the last part is not working =(.

http://codepen.io/Kingslayer/pen/kLFDf

[Chromawoods]

You are not checking the sum for NaN, you are checking it for '' (empty string). So you could replace if (sum !=='') with if (!isNaN(sum)) and it would work.

[Kingslayer]

Thanks alot =). The isNaN part was what i was missing i checked it via if (sum!== ‘NaN’) the empty check if for if a user deletes an input field it deletes the sum =).

[Chromawoods]

checked it via if (sum!== ‘NaN’)

'NaN' is a string, NaN is a number if you check it using typeof :/. Also, NaN === NaN turns out to be false which is confusing and f*cked up but we can use isNaN() to avoid that.

However, I don’t think I would have solved it that way. Assigning NaN to a variable seems weird I think.

[Kingslayer]

Hmm im only beginning with this kind of work, i used a diffrent kind of calculation earlier and the empty values were NaN already.

I’m always happy about input that helps me improve. Feel free !

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