What does as any mean in typescript?

What does any mean angular?

any: It is a built-in data type in TypeScript which helps in describing the type of variable which we are unsure of while writing the code. Though the data type ‘any’ is useful it shouldn’t be used unnecessarily. Syntax: var x: any; // This means x has no interface.

What does any mean in JavaScript?

any() takes an iterable of Promise objects and, as soon as one of the promises in the iterable fulfills, returns a single promise that resolves with the value from that promise.

Why not use any in TypeScript?

With the any type, it’s difficult to see what’s going wrong, and in terms of performance, it will cost you a lot. Sometimes, it’s really difficult to not use the any type. Thankfully, the TypeScript compiler did actually provide us all that we need to avoid not typing.

Why we use any in angular?

If you use any instead you are basically telling the transpiler that anything goes, you are providing no information about what is stored in a – it can be anything! And therefore the transpiler will allow you to do whatever you want with something defined as any .

What is type Never?

TypeScript introduced a new type never , which indicates the values that will never occur. The never type is used when you are sure that something is never going to occur. For example, you write a function which will not return to its end point or always throws an exception.

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Is it OK to use any in TypeScript?

When to use Any in TypeScript

Use the any type when there are no other options, and there are no type definitions available for that particular piece of code you’re working with.

What does === mean in JavaScript?

The triple equals operator ( === ) returns true if both operands are of the same type and contain the same value. If comparing different types for equality, the result is false. This definition of equality is enough for most use cases. When comparing the string “0” and the number 0 the result is false as expected.

How do I avoid TypeScript?

Avoiding the TypeScript `any` type

  1. unknown can usually be used instead. The unknown type is relatively new, introduced in TypeScript 3.0. …
  2. Record can be used for basic objects. …
  3. Explicit types are easier to understand and read. …
  4. Wrap up.

What is unknown TypeScript?

TypeScript 3.0 introduces a new top type unknown . unknown is the type-safe counterpart of any . Anything is assignable to unknown , but unknown isn’t assignable to anything but itself and any without a type assertion or a control flow based narrowing.

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