fastest-validator-browser

fastest-validator

⚡️ The fastest JS validator library for NodeJS.

Key features

• fast! Really!
• 9 built-in validator
• nested object & array handling
• multiple validators for fields
• customizable error messages
• programmable error object
• unit tests & 100% cover

How fast?

Very fast! 3 million validation/sec (on Intel i7-4770K, Node.JS: 6.10.0)

√ validate with pre-compiled schema x 3,052,280 ops/sec ±0.82% (93 runs sampled)

Compared to other popular libraries:

100x faster than Joi.

Would you like to test it?

$ git clone https://github.com/icebob/fastest-validator.git
$ cd fastest-validator
$ npm install
$ npm run bench

Installation

NPM

You can install it via NPM.

$ npm install fastest-validator --save

or

$ yarn add fastest-validator

Usage

Simple method

Call the validate method with the object and the schema.

If the performance is important, you won't use this method.

let Validator = require("fastest-validator");
 
let v = new Validator();
 
const schema = {
    id: { type: "number", positive: true, integer: true },
    name: { type: "string", min: 3, max: 255 },
    status: "boolean" // short-hand def
};
 
console.log(v.validate({ id: 5, name: "John", status: true }, schema));
// Returns: true
 
console.log(v.validate({ id: 5, name: "Al", status: true }, schema));
/* Returns an array with errors:
    [
        { 
            type: 'stringMin',
            expected: 3,
            actual: 2,
            field: 'name',
            message: 'The \'name\' field length must be larger than or equal to 3 characters long!'
        }
    ]
*/

Try it on Runkit

Fast method

In this case, the first step is to compile the schema to a compiled "checker" function. After it if you would like to validate your object, just call this "checker" function with your object.

This method is ~10x faster than "simple method".

let Validator = require("fastest-validator");
 
let v = new Validator();
 
const schema = {
    id: { type: "number", positive: true, integer: true },
    name: { type: "string", min: 3, max: 255 },
    status: "boolean" // short-hand def
};
 
const check = v.compile(schema);
 
console.log(check({ id: 5, name: "John", status: true }));
// Returns: true
 
console.log(check({ id: 2, name: "Adam" }));
/* Returns an array with errors:
    [
        { 
            type: 'required',
            field: 'status',
            message: 'The \'status\' field is required!'
        }
    ]
*/

Try it on Runkit

Optional & required fields

Every fields in the schema will be required field. If you would like to define optional fields, set optional: true.

let schema = {
    name: { type: "string" }, // required
    age: { type: "number", optional: true }
}
 
v.validate({ name: "John", age: 42 }, schema); // Valid
v.validate({ name: "John" }, schema); // Valid
v.validate({ age: 42 }, schema); // Fail

Multiple validators

There is possible to define more validators for a field. In this case if one of all validators is success, the field will be valid.

let schema = {
    cache: [
        { type: "string" },
        { type: "boolean" }
    ]
}
 
v.validate({ cache: true }, schema); // Valid
v.validate({ cache: "redis://" }, schema); // Valid
v.validate({ cache: 150 }, schema); // Fail

Built-in validators

any

This is not validate the type of value. Accept any types.

let schema = {
    prop: { type: "any" }
}
 
v.validate({ prop: true }, schema); // Valid
v.validate({ prop: 100 }, schema); // Valid
v.validate({ prop: "John" }, schema); // Valid

array

This is an Array validator.

Simple example with strings:

let schema = {
    roles: { type: "array", items: "string" }
}
 
v.validate({ roles: ["user"] }, schema); // Valid
v.validate({ roles: [] }, schema); // Valid
v.validate({ roles: "user" }, schema); // Fail

Example with only positive number:

let schema = {
    list: { type: "array", min: 2, items: {
        type: "number", positive: true, integer: true
    } }
}
 
v.validate({ list: [2, 4] }, schema); // Valid
v.validate({ list: [1, 5, 8] }, schema); // Valid
v.validate({ list: [1] }, schema); // Fail (min 2 elements)
v.validate({ list: [1, -7] }, schema); // Fail (negative number)

Example with object list:

let schema = {
    users: { type: "array", items: {
        type: "object", props: {
            id: { type: "number", positive: true },
            name: { type: "string", empty: false },
            status: "boolean"
        }
    } }
}
 
v.validate({ 
    users: [
        { id: 1, name: "John", status: true },
        { id: 2, name: "Jane", status: true },
        { id: 3, name: "Bill", status: false }
    ]
}, schema); // Valid

Properties

Property	Default	Description
empty	true	If true, the validator accepts empty array [].
min	null	Minimum count of elements.
max	null	Maximum count of elements.
length	null	Fix count of elements.
contains	null	The array must contains this element too.
enum	null	Every element must be an element of the enum array.

Example for enum:

let schema = {
    roles: { type: "array", items: "string", enum: [ "user", "admin" ] }
}
 
v.validate({ roles: ["user"] }, schema); // Valid
v.validate({ roles: ["user", "admin"] }, schema); // Valid
v.validate({ roles: ["guest"] }, schema); // Fail

boolean

This is a Boolean validator.

let schema = {
    status: { type: "boolean" }
}
 
v.validate({ status: true }, schema); // Valid
v.validate({ status: false }, schema); // Valid
v.validate({ status: 1 }, schema); // Fail
v.validate({ status: "true" }, schema); // Fail

Properties

Property	Default	Description
convert	false	if true and the type is not Boolean, try to convert. 1, "true", "1", "on" will be true. 0, "false", "0", "off" will be false.

date

This is a Date validator.

let schema = {
    dob: { type: "date" }
}
 
v.validate({ dob: new Date() }, schema); // Valid
v.validate({ dob: new Date(1488876927958) }, schema); // Valid
v.validate({ dob: 1488876927958 }, schema); // Fail

Properties

Property	Default	Description
convert	false	if true and the type is not Date, try to convert with new Date().

email

This is an e-mail address validator.

let schema = {
    email: { type: "email" }
}
 
v.validate({ email: "[e-mail]" }, schema); // Valid
v.validate({ email: "[e-mail]" }, schema); // Valid
v.validate({ email: "abc@gmail" }, schema); // Fail

Properties

Property	Default	Description
mode	quick	Checker method. Can be quick or precise.

forbidden

This validator gives error if the property is exists in the object.

let schema = {
    password: { type: "forbidden" }
}
 
v.validate({ user: "John" }, schema); // Valid
v.validate({ user: "John", password: "pass1234" }, schema); // Fail

function

The type of value must be Function.

let schema = {
    show: { type: "function" }
}
 
v.validate({ show: function() {} }, schema); // Valid
v.validate({ show: Date.now }, schema); // Valid
v.validate({ show: null }, schema); // Fail

number

This is a number validator. The type of value must be Number.

let schema = {
    age: { type: "number" }
}
 
v.validate({ age: 123 }, schema); // Valid
v.validate({ age: 5.65 }, schema); // Valid
v.validate({ age: "100" }, schema); // Fail

Properties

Property	Default	Description
min	null	Minimum value.
max	null	Maximum value.
equal	null	Fix value.
notEqual	null	Can't be equal with this value.
integer	false	The value must be a non-decimal value.
positive	false	The value must be larger than zero.
negative	false	The value must be less than zero.
convert	false	if true and the type is not Number, try to convert with parseFloat.

object

This is a nested object validator.

let schema = {
    address: { type: "object", props: {
        country: { type: "string" },
        city: "string", // short-hand
        zip: "number" // short-hand
    } }
}
 
v.validate({ 
    address: {
        country: "Italy",
        city: "Rome",
        zip: 12345
    } 
}, schema); // Valid
 
v.validate({ 
    address: {
        country: "Italy",
        city: "Rome"
    }
}, schema); // Fail ("The 'address.zip' field is required!")

string

This is a string validator. The type of value must be String.

let schema = {
    name: { type: "string" }
}
 
v.validate({ name: "John" }, schema); // Valid
v.validate({ name: "" }, schema); // Valid
v.validate({ name: 123 }, schema); // Fail

Properties

Property	Default	Description
empty	true	If true, the validator accepts empty string "".
min	null	Minimum length of value.
max	null	Maximum length of value.
length	null	Fix length of value.
pattern	null	Regex pattern.
contains	null	The value must contains this text.
enum	null	The value must be an element of the enum array.

url

This is an URL validator.

let schema = {
    url: { type: "url" }
}
 
v.validate({ url: "http://google.com" }, schema); // Valid
v.validate({ url: "https://github.com/icebob" }, schema); // Valid
v.validate({ url: "www.facebook.com" }, schema); // Fail

Custom validator

You can also create your custom validator.

let v = new Validator({
    messages: {
        // Register our new error message text
        evenNumber: "The '{field}' field must be an even number! Actual: {actual}"
    }
});
 
// Register a custom 'even' validator
v.add("even", value => {
    if (value % 2 != 0)
        return v.makeError("evenNumber", null, value);
 
    return true;
});
 
const schema = {
    name: { type: "string", min: 3, max: 255 },
    age: { type: "even" }
};
 
console.log(v.validate({ name: "John", age: 20 }, schema));
// Returns: true
 
console.log(v.validate({ name: "John", age: 19 }, schema));
/* Returns an array with errors:
    [{
        type: 'evenNumber',
        expected: null,
        actual: 19,
        field: 'age',
        message: 'The \'age\' field must be an even number! Actual: 19'
    }]
*/

Or you can use the custom type with inline checker function:

let v = new Validator({
    messages: {
        // Register our new error message text
        weightMin: "The weight must be larger than {expected}! Actual: {actual}"
    }
});
 
const schema = {
    name: { type: "string", min: 3, max: 255 },
    weight: { 
        type: "custom", 
        minWeight: 10, 
        check(value, schema) {
            return (value < schema.minWeight)
                ? this.makeError("weightMin", schema.minWeight, value)
                : true;
        }
    }
};
 
console.log(v.validate({ name: "John", weight: 50 }, schema));
// Returns: true
 
console.log(v.validate({ name: "John", weight: 8 }, schema));
/* Returns an array with errors:
    [{ 
        type: 'weightMin',                                       
        expected: 10,                                            
        actual: 8,                                               
        field: 'weight',                                         
        message: 'The weight must be larger than 10! Actual: 8' 
    }]
*/

Custom error messages (l10n)

You can set your custom messages in constructor of validator.

const Validator = require("fastest-validator");
const v = new Validator({
    messages: {
        stringMin: "A(z) '{field}' mező túl rövid. Minimum: {expected}, Jelenleg: {actual}",
        stringMax: "A(z) '{field}' mező túl hosszú. Minimum: {expected}, Jelenleg: {actual}"
    }
});
 
v.validate({ name: "John" }, { name: { type: "string", min: 6 }});
/* Returns:
[ 
    { 
        type: 'stringMin',
        expected: 6,
        actual: 4,
        field: 'name',
        message: 'A(z) \'name\' mező túl rövid. Minimum: 6, Jelenleg: 4' 
    } 
]
*/

Message types

Name	Default text
required	The '{field}' field is required!
string	The '{field}' field must be a string!
stringEmpty	The '{field}' field must not be empty!
stringMin	The '{field}' field length must be larger than or equal to {expected} characters long!
stringMax	The '{field}' field length must be less than or equal to {expected} characters long!
stringLength	The '{field}' field length must be {expected} characters long!
stringPattern	The '{field}' field fails to match the required pattern!
stringContains	The '{field}' field must contain the '{expected}' text!
stringEnum	The '{field}' field does not match any of the allowed values!
number	The '{field}' field must be a number!
numberMin	The '{field}' field must be larger than or equal to {expected}!
numberMax	The '{field}' field must be less than or equal to {expected}!
numberEqual	The '{field}' field must be equal with {expected}!
numberNotEqual	The '{field}' field can't be equal with {expected}!
numberInteger	The '{field}' field must be an integer!
numberPositive	The '{field}' field must be a positive number!
numberNegative	The '{field}' field must be a negative number!
array	The '{field}' field must be an array!
arrayEmpty	The '{field}' field must not be an empty array!
arrayMin	The '{field}' field must contain at least {expected} items!
arrayMax	The '{field}' field must contain less than or equal to {expected} items!
arrayLength	The '{field}' field must contain {expected} items!
arrayContains	The '{field}' field must contain the '{expected}' item!
arrayEnum	The '{field} field value '{expected}' does not match any of the allowed values!
boolean	The '{field}' field must be a boolean!
function	The '{field}' field must be a function!
date	The '{field}' field must be a Date!
dateMin	The '{field}' field must be larger than or equal to {expected}!
dateMax	The '{field}' field must be less than or equal to {expected}!
forbidden	The '{field}' field is forbidden!
email	The '{field}' field must be a valid e-mail!

Message fields

Name	Description
field	Name of field
expected	The expected value of field
actual	The actual value of field
type	Type of field

Development

npm run dev

Test

npm test

Coverage report

---------------|----------|----------|----------|----------|----------------|
File           |  % Stmts | % Branch |  % Funcs |  % Lines |Uncovered Lines |
---------------|----------|----------|----------|----------|----------------|
All files      |      100 |      100 |      100 |      100 |                |
 lib           |      100 |      100 |      100 |      100 |                |
  messages.js  |      100 |      100 |      100 |      100 |                |
  validator.js |      100 |      100 |      100 |      100 |                |
 lib/rules     |      100 |      100 |      100 |      100 |                |
  any.js       |      100 |      100 |      100 |      100 |                |
  array.js     |      100 |      100 |      100 |      100 |                |
  boolean.js   |      100 |      100 |      100 |      100 |                |
  date.js      |      100 |      100 |      100 |      100 |                |
  email.js     |      100 |      100 |      100 |      100 |                |
  forbidden.js |      100 |      100 |      100 |      100 |                |
  function.js  |      100 |      100 |      100 |      100 |                |
  number.js    |      100 |      100 |      100 |      100 |                |
  object.js    |      100 |      100 |      100 |      100 |                |
  string.js    |      100 |      100 |      100 |      100 |                |
  url.js       |      100 |      100 |      100 |      100 |                |
---------------|----------|----------|----------|----------|----------------|

Contribution

Please send pull requests improving the usage and fixing bugs, improving documentation and providing better examples, or providing some testing, because these things are important.

License

fastest-validator is available under the MIT license.

Contact

Copyright (C) 2017 Icebob