// any是一组包含所有类型的类型。因此，如果你将类型1添加到any类型中，它仍然是any类型。
// 你可以将任何事物视为数学上的无穷大。无穷大+1仍然是无穷大。
type IsAny<T> = 0 extends (1 & T) ? true : false

Solution by ouzexi #34221

type IsNotAny<T> = T extends never ? true : never
type IsAny<T> = [IsNotAny<T>] extends [never] ? false : true

Solution by PiligrimStas #33788

// your answers
type IsAny<T> = [T, 1] extends [0, T] ? true : false

Solution by DevilTea #33440

// your answers
type IsAny<T> = (T extends never ? true : false) extends true ?
  false
  :(T extends never ? true : false) extends false ?
    false
    :true; 

It seems right ,but i don't know why.

Solution by sciencefunq #32967

type IsAny<T> = (<G>() => G extends T ? 1 : 2) extends (<G>() => G extends any ? 1 : 2) ? true : false;

Solution by rldnd #32908

type IsAny<T> = keyof any extends keyof T
  ? 1 extends T
    ? true
    : false
  : false

• keyof any and keyof never are equal. (symbol | number | string)
• any can be assigned, never cannot.

Solution by findmio #32806

// your answers
type Equality<X, Y> = (<T>() => T extends X ? 1 : 2) extends <P>() => P extends Y ? 1 : 2 ? true : false
type IsAny<T> = Equality<T, any> extends true ? true : false;

Solution by kakasoo #32689

type IsAny<T> = 1 extends "jarvey" & T ? true : false;

Solution by DoubleWoodLin #28936

type IsAny<T> = 0 extends (1 & T) ? true : false;

Solution by jjswifty #27543

type IsAny<T> = 0 extends (1 & T) ? true : false

Solution by smileboyi #27497

// your answers
type IsAny<T> = (any extends T & 0 ? 1 : 2) extends 1 ? true : false

Solution by studymachiney #25129

type IsAny<T> = 2 extends 1 & T ? true : false;

// type IsAny<T> = Equal<T, any>;
// old way
// type IsAny<T> = (any extends T & 0 ? 1 : 2) extends 1 ? true : false; //any特性题

Solution by E-uler #24702

// your answers
type IsAny<T> = 0 extends 1&T ?true:false

Solution by walker-hzx #24543

type IsAny<T> = Equal<T, any> extends true ? true : false

Solution by NeylonR #24444

Only any is both a subtype and a supertype of nearly everything. I'm using never here but it works with almost any type you can come up with.

type IsNever<T> = T extends never ? true : false;
type IsAny<T> = boolean extends IsNever<T> ? true : false;

Solution by Robinsstudio #23650

// your answers
type IsAny<T> = Equal<T, any> extends true  ? true : false

Solution by snakeUni #23511

// your answers
type IsAny<T> = 'hello' extends T & 'world' ? true : false;

Solution by jxhhdx #22854

// your answers
type IsAny<T> = boolean extends (T extends 1
    ? T extends 2
      ? true
      : false
    : false
)
? true : false

Solution by 437204933 #22293

type IsAny<T> = 'A' extends T & 'B' ? true : false

Solution by drylint #22216

type IsAny<T> = 1 | 2 extends (T extends never ? 1 : 2) ? true : false

Solution by goddnsgit #21881

type IsAny<T> = Equal<T, any>;

Solution by ivbrajkovic #21638

type IsAny<T> = "嘻嘻" extends  T  ? true : false;

Solution by so11y #21112

// your answers
type IsAny<T> = 0 extends 1 & T ? true : false

Solution by YqxLzx #20667

// your answers
type IsAny<T> = any[] | object | string | number | undefined | never extends T ? [T] extends [object | string | number | undefined | never] ? true : false : false 

Solution by YqxLzx #20581

type IsAny<T> = 0 extends (1 & T) ? true : false;

originated from https://github.com/type-challenges/type-challenges/issues/232

Solution by zhaoyao91 #20489

// your answers
type IsAny<T> = "any" extends 1 & T ? true : false;
type IsAny2<T> = (<A>() => A extends T ? 1 : 0) extends <A>() => A extends any
  ? 1
  : 0
  ? true
  : false;

Solution by fengjinlong #20211

type EqualTo<X, Y> = (<T>() => T extends X ? 1 : 2) extends <T>() => T extends Y ? 1 : 2 ? true : false;

type IsAny<T> = EqualTo<T, any>;

Solution by CaoXueLiang #19028

type IsAny<T> = 'any' extends 1 & T ? true : false

type IsAny<T> = (<A>() =>  A extends T ? 1 : 0) extends (<A>() => A extends any ? 1 : 0) ? true : false

type a = 1 & any // any

Solution by milletlovemouse #18709

// your answers
type IsAny<T> = (<S>(S: S) => S extends T ? 1 : 2) extends (<R>(R: R) => R extends any ? 1 : 2) ? true : false; 

Solution by jiaaoMario #17220

// your answers
type IsAny<T> = Equal<T, any>

Solution by Stan-BK #16433