lewd

lewd is an intuitive and easy to use data validation library inspired by Python's voluptuous.

Getting Started

Typically, your validations will look something like this:

var signUpValidator = lewd({
    name: String,
    username: lewd.all(String, lewd.range({ min: 3, max: 8 }), /^[a-z][a-z0-9]+$/i),
    password: lewd.all(String, lewd.range({ min: 5, max: 15 })),
    sex: lewd.some('male', 'female').optional(),
    street: String,
    zip: Number,
    city: String,
    subscribeToNewsletter: lewd(Boolean).default(false)
});
 
// assuming you know your data is a valid JSON string
var data = JSON.parse(rawData);
 
try {
    signUpValidator(data);
} catch (e) {
    console.warn(e.toString());
}

But they can of course get more complex by logically combining conditions or nesting validation structures. Please take a look at our wiki for a thorough introduction how to use lewd and its many features.

Features

• intuitive and concise API
• supports arbitrarily nested structures
• optionally remove invalid or unexpected keys from objects
• compose larger structures by combining and re-using smaller ones
• value coercion
• default values
• custom validators
• custom error messages
• thoroughly unit tested
• runs in browsers as an UMD module (experimental)

Contributing

You found a bug, fixed a typo or came up with a cool new feature? Feel free to open issues or send pull requests and I'll do my best to merge them. Please make sure you add tests as needed and reference the issue number in your commit (please open one if necessary). Pull requests must not break any JSHint and JSCS rules or let the test coverage drop below 100% (npm test is your friend).

License

lewd is licensed under the BSD 2-Clause License. You can find it in the LICENSE file.