typeof is used to differentiate between the different types in TypeScript . By the use of typeof we can differentiate between number, string, symbol, Boolean, etc. typeof can be used with any type in TypeScript, by the use of it we can re-use the code by passing any parameter type.
Read moreWhat type is {} TypeScript?
TypeScript has another type called empty type denoted by {} , which is quite similar to the object type.
Read moreHow do I check if typeof is null?
The typeof keyword returns “object” for null , so that means a little bit more effort is required. Comparisons can be made: null === null to check strictly for null or null == undefined to check loosely for either null or undefined.
Read moreWhat is typeof null in JavaScript?
In JavaScript null is “nothing” . It is supposed to be something that doesn’t exist. Unfortunately, in JavaScript, the data type of null is an object. You can consider it a bug in JavaScript that typeof null is an object. It should be null .
Read moreWhat are the six JavaScript data types?
Steve Suehring discusses the six data types in JavaScript: numbers, strings, booleans, null, undefined, and objects .
Read moreHow do you know if typeof is undefined?
In a JavaScript program, the correct way to check if an object property is undefined is to use the `typeof` operator .26 May 2018
Read moreWhy is JavaScript saying undefined?
The undefined property indicates that a variable has not been assigned a value, or not declared at all .
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