CODEWITHSUNDEEP
angulartypescript
landers
landers

Reputation: 105

Typescript / Angular drill down property checking

Is there a simple generic way in Typescript/Angular to see if a complete path to a property exists and has a value?

For example Could I have a function like

if (thisExists(aaa.bbb.ccc.ddd)) {
 ...
}

Where thisExists would determine somehow that it needs to check

if (aaa == null) return false
if (aaa.bbb == null) return false

etc I know from the html perspective there's a ?. operator, but is there something on the typescript side?

Upvotes: 0

Views: 141

Answers (1)

Kiran Shinde
Kiran Shinde

Reputation: 5992

You can do something like this, which is called optional chaining

if (aaa?.bbb?.ccc?.ddd) {

Upvotes: 2

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