Security News
The Unpaid Backbone of Open Source: Solo Maintainers Face Increasing Security Demands
Solo open source maintainers face burnout and security challenges, with 60% unpaid and 60% considering quitting.
The 'ow' npm package is a powerful and expressive validation library for Node.js. It allows developers to validate arguments and inputs in a concise and readable manner. 'ow' provides a variety of built-in validators and supports custom validation logic, making it a versatile tool for ensuring data integrity in applications.
Basic Type Validation
This feature allows you to validate the type of a variable. In this example, the function `validateString` checks if the input is a string. If the input is not a string, an error is thrown.
const ow = require('ow');
const validateString = (input) => {
ow(input, ow.string);
};
validateString('Hello, World!'); // Passes
validateString(123); // Throws an error
Complex Object Validation
This feature allows you to validate the shape and properties of an object. In this example, the function `validateUser` checks if the user object has a `name` property that is a string with a minimum length of 3 and an `age` property that is a positive integer.
const ow = require('ow');
const validateUser = (user) => {
ow(user, ow.object.exactShape({
name: ow.string.minLength(3),
age: ow.number.integer.positive
}));
};
validateUser({ name: 'Alice', age: 25 }); // Passes
validateUser({ name: 'Al', age: -5 }); // Throws an error
Custom Validation
This feature allows you to create custom validation logic. In this example, the function `validateEvenNumber` checks if the input is an even number. If the input is not an even number, an error is thrown with a custom message.
const ow = require('ow');
const validateEvenNumber = (input) => {
ow(input, ow.number.validate(n => ({
validator: n % 2 === 0,
message: 'Expected an even number'
})));
};
validateEvenNumber(4); // Passes
validateEvenNumber(3); // Throws an error
Joi is a powerful schema description language and data validator for JavaScript. It allows you to create blueprints or schemas for JavaScript objects to ensure validation of key information. Compared to 'ow', Joi offers a more extensive API and is widely used in the industry for complex validation tasks.
Yup is a JavaScript schema builder for value parsing and validation. It is similar to Joi but is often preferred for its simplicity and ease of use, especially in React applications. Yup provides a fluent API for object schema validation and is highly customizable.
Validator is a library of string validators and sanitizers. It is less comprehensive than 'ow' but is highly efficient for validating and sanitizing strings. Validator is often used for simple validation tasks such as checking email formats, URLs, and other string-based validations.
This package name is not currently in use, but was formerly occupied by another package. To avoid malicious use, npm is hanging on to the package name, but loosely, and we'll probably give it to you if you want it.
You may adopt this package by contacting support@npmjs.com and requesting the name.
FAQs
Function argument validation for humans
The npm package ow receives a total of 688,732 weekly downloads. As such, ow popularity was classified as popular.
We found that ow demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Solo open source maintainers face burnout and security challenges, with 60% unpaid and 60% considering quitting.
Security News
License exceptions modify the terms of open source licenses, impacting how software can be used, modified, and distributed. Developers should be aware of the legal implications of these exceptions.
Security News
A developer is accusing Tencent of violating the GPL by modifying a Python utility and changing its license to BSD, highlighting the importance of copyleft compliance.