isInteger ​
INFO
This function is only available in es-toolkit/compat for compatibility reasons. It either has alternative native JavaScript APIs or isn’t fully optimized yet.
When imported from es-toolkit/compat, it behaves exactly like lodash and provides the same functionalities, as detailed here.
Checks if value is an integer.
This function can also serve as a type predicate in TypeScript, narrowing the type of the argument to number.
Signature ​
typescript
function isInteger(value?: unknown): value is number;Parameters ​
value(unknown): The value to check.
Returns ​
(boolean): true if value is integer, otherwise false.
Examples ​
typescript
isInteger(3); // Returns: true
isInteger(Infinity); // Returns: false
isInteger('3'); // Returns: false
isInteger([]); // Returns: false