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Optional Chaining

Optional chaining is a browser-native way to chain methods or properties, and conditionally continue down the chain only if the value is not null or undefined.

To use optional chaining, add a question mark (?) before the dot (.) in your chain.

// returns "Abracadabra!"
let summonOptional = wizard?.spells?.summon?.phrase;

// returns undefined but does not throw an error
let teacupsOptional = wizard?.spells?.teacup?.phrase;

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