Valido

General purpose check and validation library.

The focus is on providing selected, well tested checks and a convenient API. The library is inspired by other projects, like is_js and joi in terms of the API, but completely written from ground up to be easily extendable and testable.

Contributions are welcome.

Installing

npm install valido

Usage

const is = require('valido');

is.uri('http://www.test.com');
--> true

is.all.uri(['http://www.test.com', 123]);
--> false

is.optional.uri(null);
--> true

is.optional.uri('http://www.test.com');
--> true

is.optional.uri(123);
--> false

API

all

Will return true if all elements in the list validate to true. Can be combined with all predicates.

is.all.number([007, 123]);
--> true

is.all.number(['abc', 123]);
--> false

optional

Will return true if the provided value is either null/undefined or validates to true. Can be combined with all predicates.

is.optional.number(null);
--> true

is.optional.number(123);
--> true

is.optional.number('abc');
--> false

array(value:any)

Checks if value is an array.

is.array([]);
--> true

boolean(value:any)

Checks if value is a boolean.

is.boolean(true);
--> true

is.boolean(0);
--> false

buffer(value:any)

Checks if value is a buffer.

is.buffer(new Buffer('abc'));
--> true

is.buffer('abc');
--> false

date(value:any)

Checks if value is a date object.

is.date(new Date());
--> true

is.date('2016-01-01');
--> false

email(value:any)

Checks if value is a valid email according to link.

is.email('bob@test.com');
--> true

is.email('test.com');
--> false

existy(value:any)

Checks if value is not null and not undefined.

is.existy(123);
--> true

is.existy(null);
--> false

finite(value:any)

Checks if value is finite.

is.finite(123);
--> true

is.finite(2e64);
--> true

is.finite(Infinity);
--> false

function(value:any)

Checks if value is a function.

is.function(() => {});
--> true

is.function(function(){});
--> true

is.function('function');
--> false

hexColor(value:any)

Checks if value is a hex color.

is.hexColor('#ff3366');
--> true

is.hexColor('#fff');
--> true

is.hexColor('cc33cc');
--> false

is.hexColor('fff');
--> false

integer(value:any)

Checks if value is an integer.

is.integer(123);
--> true

is.integer(-1);
--> true

is.integer(2e64);
--> true

is.integer(1.1);
--> false

natural(value:any, option:object)

Checks if value is a natural number.

is.natural(123);
--> true

is.natural(0);
--> true

is.natural(0, { disallowZero: true });
--> false

is.natural(1.1);
--> false

is.natural(-1);
--> false

null(value:any)

Checks if value is null.

is.null(null);
--> true

is.null(0);
--> false

is.null(undefined);
--> false

number(value:any)

Checks if value is of type number.

is.number(1);
--> true

is.number(Math.PI);
--> true

is.number(NaN);
--> true

is.number(Infinity);
--> true

is.number(2e64);
--> true

is.number('1');
--> false

plainObject(value:any)

Checks if value is a plain object (prototype is Object).

is.plainObject({});
--> true

is.plainObject(Object.assign({}));
--> true

is.plainObject(new Object({});
--> true

is.plainObject(function(){});
--> false

stream(value:any)

Checks if value is a stream.

const Stream = require('stream');

is.stream(new Stream.Readable());
--> true

is.stream(new Stream.Writable());
--> true

is.stream(new Stream.Transform());
--> true

is.stream(new Stream.PassThrough());
--> true

is.stream(new Stream.Duplex());
--> true

is.stream(123);
--> false

string(value:any, options:object)

Checks if value is a string.

is.string('abc');
--> true

is.string('abc', { startsWith: 'a' });
--> true

is.string('abc', { endsWith: 'b' });
--> false

is.string(123);
--> false

undefined(value:any)

Checks if value is undefined.

is.undefined(undefined);
--> true

is.undefined(null);
--> false

uri(value:any, options:object)

Checks if value is a URI according to RFC 3986.

is.uri('https://8.8.8.8:3128');
--> true

is.uri('https://localhost:80');
--> true

is.uri('mongodb://db.server.com:1234');
--> true

is.uri('https://user:pass@www.test.com:8080/index.html?param=2&yy=abc');
--> true

is.uri('https://www.test.com/', { endsWith: '/' });
--> true

is.uri('https://www.test.com/', { startsWith: 'https://www.other.com' });
--> false

is.uri('google.com');
--> false