types-checker.js

types-checker.js is a utility library for checking and processing various data types in JavaScript.

Installation

You can install types-checker.js using npm:

npm install types-checker.js

const typesChecker = require('types-checker.js');

// Example usage
const isString = typesChecker.isString('Hello, world!');
console.log(isString); // Output: true

const isArray = typesChecker.isArray([1, 2, 3]);
console.log(isArray); // Output: true

const isDate = typesChecker.isDate(new Date());
console.log(isDate); // Output: true

Primitive Types Checking Functions

• isNumber(value): Checks if the value is a number.

• isString(value): Checks if the value is a string.

• isBoolean(value): Checks if the value is a boolean.

• isUndefined(value): Checks if the value is undefined.

• isSymbol(value): Checks if the value is a symbol.

• isBigInt(value): Checks if the value is a BigInt.

String Checking Functions

• isString(value): Checks if the value is a string.

• isNonEmptyString(value): Checks if the value is a non-empty string.

• isAlpha(value): Checks if the string consists only of alphabetic characters.

• isAlphanumeric(value): Checks if the string consists of alphanumeric characters.

• isEmail(value): Checks if the string is a valid email address.

• isUrl(value): Checks if the string is a valid URL.

Array Checking Functions

• isArray(value): Checks if the value is an array.
• isArrayOfNumbers(value): Checks if every element in the array is a number.
• isArrayOfStrings(value): Checks if every element in the array is a string.
• isArrayOfObjects(value): Checks if every element in the array is an object.
• isArrayOfBooleans(value): Checks if every element in the array is a boolean value (true or false).
• isArrayOf(type, value): Checks if every element in the array is of the specified type.

Date Checking Functions

• isDate(value): Checks if the value is a Date object.

• isBeforeDate(value, referenceDate): Checks if the given date is before the reference date.

• isAfterDate(value, referenceDate): Checks if the given date is after the reference date.

• isDateInRange(value, startDate, endDate): Checks if the given date is within the specified date range.

Function Checking Functions

• isFunction(value): Checks if the value is a function.

• hasArity(value, expectedArity): Checks if the function has the expected number of parameters (arity).

• hasMinArity(value, minArity): Checks if the function has at least the specified minimum number of parameters.

• hasMaxArity(value, maxArity): Checks if the function has at most the specified maximum number of parameters.

• isAsyncFunction(value): Checks if the value is an asynchronous function (async function).

• isGeneratorFunction(value): Checks if the value is a generator function.

• isConstructor(value): Checks if the value is a constructor function (can be used with the 'new' keyword).

Object Checking Functions

• isObject(value): Checks if the value is an object.

• isObjectWithKeys(value, keys): Checks if the object has all the specified keys.

• isObjectOf(value, key, type): Checks if the value of the specified key in the object is of the specified type.

• isObjectWithKeysAndTypes(value, keyTypeMap): Checks if the object has keys matching the specified types.

• isObjectWithNestedObjects(value): Checks if the object contains nested objects.

Promise Checking Functions

• isPromise(value): Checks if the value is a Promise.

• isFulfilledPromise(value): Checks if the value is a fulfilled Promise (resolved).

• isRejectedPromise(value): Checks if the value is a rejected Promise.

• isPendingPromise(value): Checks if the value is a pending Promise

IP Checking Functions

• isIPv4(value): Checks if the value is a valid IPv4 address.

• isIPv6(value): Checks if the value is a valid IPv6 address.

UUID Checking Functions

• isUUID(value): Checks if the value is a valid UUID (any version).

• isUUIDv3(value): Checks if the value is a valid UUIDv3.

• isUUIDv4(value): Checks if the value is a valid UUIDv4.

• isUUIDv5(value): Checks if the value is a valid UUIDv5.