Typescript Optional Chaining Function

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It tells TypeScript to leave the expressions result as it is and pass it to JavaScript It allows the use of JavaScript semantics in TypeScript such as using loose equality with the

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As of TypeScript 3 7 released on November 5 2019 this feature is supported and is called Optional Chaining At its core optional chaining lets us write code where

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TypeScript is a superset of the JavaScript language that has a single open source compiler and is developed mainly by a single vendor Microsoft The goal of TypeScript is to help catch

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TypeScript 3 0 introduces unknown type according to their wiki unknown is now a reserved type name as it is now a built in type Depending on your intended use of unknown

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As of TypeScript 3 7 you can use nullish coalescing operator You can think of this feature as a way to fall back to a default value when dealing with null or undefined let

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Intersection refers to the resulting type not the operation performed on the properties An object belonging to both Type A and Type B must have all properties in A so that it is an instance of

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As for choosing one over the other I believe it is best said in the second edition of the TypeScript Handbook For the most part you can choose based on personal preference and TypeScript

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TypeScript has three confusing types Object and object You can t assign undefined nor null to any of those types except if the strictNullChecks compiler option is

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If you are using Typescript presumably you want to use the type safety in which case naked Object and any are counterindicated Better to not use Object or but some named type or