CODEWITHSUNDEEP
typescript
Crocsx
Crocsx

Reputation: 7640

How to allow 0 but not undefined, null, '' in ternary?

let's say I have this ternary

control.value ? null : { invalid: true };

I want value to be valid if it's anything BUT null undefined and ""

Now 0 is a valid value.

I know there is a nullish coalescing operator in typescript ?? but it is not usable in ternary.

so How would I make this line simple ? Is there a syntax better than control.value === 0 || control.value ? null : { invalid: true }; to consider 0 as valid ?

Upvotes: 1

Views: 491

Answers (1)

brandon van zyl
brandon van zyl

Reputation: 159

Hopefully this helps you:

value ? null: value === 0 ? null : { invalid: true }

Upvotes: 1

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