. Optional Chaining Operator in JavaScript | Optional Chaining | | Optional Chaining vs Nullish
The optional chaining operator (?.) permits reading the value of a property located deep within a chain of connected objects without having to expressly validate that each reference in the chain is valid. The ?. operator functions similarly to the . chaining operator, except that instead of causing an error if a reference is nullish (null or undefined), the expression short-circuits with a return value of undefined. When used with function calls, it returns undefined if the given function does not exist.
This results in shorter and simpler expressions when accessing chained properties when the possibility exists that a reference may be missing. It can also be helpful while exploring the content of an object when there's no known guarantee as to which properties are required.
In questa pagina del sito puoi guardare il video online . Optional Chaining Operator in JavaScript | Optional Chaining | | Optional Chaining vs Nullish della durata di ore minuti seconda in buona qualità , che l'utente ha caricato Mvndr4u 02 gennaio 2021, condividi il link con amici e conoscenti, su youtube questo video è già stato visto 55 volte e gli è piaciuto 7 spettatori. Buona visione!
