@hgargg-0710/one/dist/src/type/type.js

A tiny npm library purposed for providing beautiful solutions to frequent miniature (one-line/one-expression) tasks for various JS datatypes.

import { not } from "../boolean/boolean.js";
import { isEmpty } from "../string/string.js";
/**
 * Returns whether a given `x` is a number primitive
 */
export const isNumber = (x) => typeof x === "number";
/**
 * Returns whether `x` is a function
 */
export const isFunction = (x) => typeof x === "function";
/**
 * Returns whether `x` is a string primitive
 */
export const isString = (x) => typeof x === "string";
/**
 * Returns whether `x` is a boolean primitive
 */
export const isBoolean = (x) => typeof x === "boolean";
/**
 * Returns whether `x` is a symbol primitive
 */
export const isSymbol = (x) => typeof x === "symbol";
/**
 * Returns whether `x` is an object
 */
export const isObject = (x) => typeof x === "object";
/**
 * Returns whether `x` is `null`
 */
export const isNull = (x) => x === null;
/**
 * Returns whether `x` is `undefined`
 */
export const isUndefined = (x) => x === undefined;
/**
 * Returns whether `x == null`
 */
export const isNullary = (x) => x == null;
/**
 * Returns `typeof x`
 */
export const typeOf = (x) => typeof x;
/**
 * Returns whether `x` is an `Array`
 */
export const isArray = (x) => x instanceof Array;
/**
 * Returns whether `x` is a `Set`
 */
export const isSet = (x) => x instanceof Set;
/**
 * Returns whether `x` is a `Map`
 */
export const isMap = (x) => x instanceof Map;
/**
 * Returns a bool indicating whether it is possible to call `Number(x)` without:
 *
 * 1. getting `NaN`
 * 2. getting an error (this happens if `x` is a symbol)
 * 3. `x` being an empty string
 */
export function isNumberConvertible(x) {
    return ((isNumber(x) && !isNaN(x)) ||
        (isString(x) && !isNaN(Number(x)) && !isEmpty(x)) ||
        isBoolean(x) ||
        isNull(x));
}
/**
 * Returns whether `x` is a truthy value
 */
export const isTruthy = (x) => !!x;
/**
 * Checks whether the given `x` is `Falsy`
 */
export const isFalsy = not;
/**
 * Returns either `x` if it's a non-`null` object, or `false`, if it isn't
 */
export const isStruct = (x) => isObject(x) && x;