21 lines
609 B
TypeScript
21 lines
609 B
TypeScript
/**
|
|
* Checks if a given value is a number.
|
|
*
|
|
* This function can also serve as a type predicate in TypeScript, narrowing the type of the argument to `number`.
|
|
*
|
|
* @param {any} value The value to check if it is a number.
|
|
* @returns {value is number} Returns `true` if `value` is a number, else `false`.
|
|
*
|
|
* @example
|
|
* const value1 = 123;
|
|
* const value2 = 'abc';
|
|
* const value3 = true;
|
|
*
|
|
* console.log(isNumber(value1)); // true
|
|
* console.log(isNumber(value2)); // false
|
|
* console.log(isNumber(value3)); // false
|
|
*/
|
|
declare function isNumber(value?: any): value is number;
|
|
|
|
export { isNumber };
|