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IsInteger<T>

IsInteger<T> = T extends bigint ? true : T extends number ? number extends T ? false : T extends PositiveInfinity | NegativeInfinity ? false : Not<IsFloat<T>> : false

Defined in: packages/react-querybuilder/src/types/type-fest/is-integer.ts:41

Returns a boolean for whether the given number is a integer, like -5, 1.0 or 100.

Like Number#IsInteger() but for types.

Use-case:

  • If you want to make a conditional branch based on the result of whether a number is a intrger or not.

Type Parameters​

Type Parameter
T

Example​

type Integer = IsInteger<1>;
//=> true

type IntegerWithDecimal = IsInteger<1.0>;
//=> true

type NegativeInteger = IsInteger<-1>;
//=> true

type Float = IsInteger<1.5>;
//=> false

// Supports non-decimal numbers

type OctalInteger: IsInteger<0o10>;
//=> true

type BinaryInteger: IsInteger<0b10>;
//=> true

type HexadecimalInteger: IsInteger<0x10>;
//=> true
caution

API documentation is generated from the latest commit on the main branch. It may be somewhat inconsistent with official releases of React Query Builder.