validate-these

Validate user input on your backend or frontend without having to compose tedious error messages.

• Chainable functions to perform multiple checks.
• An ApiError object is thrown with a helpful user message just using your camel-case vars converted to sentence-case.
• Hint: You can parse messages as markdown when displaying to users.

Install

npm i validate-these

Usage

const validate = require("validate-these")

const emailAddress = "bad-email"
validate({ emailAddress }).email()
// **Email address** does not look valid.

const homePhoneNumber = "not-a-phone-number"
validate({ homePhoneNumber }).phone()
// Value for **Home phone number** does not look valid.

const firstName = "field is too long"
validate({ firstName }).notEmpty().max(12)
// Value for **First name** must be less than **12** characters.

const lastName = "a"
validate({ lastName }).min(2).max(32)
// Value for **Last name** must be at least **2** characters.

| function | description | | -------------------- | ---------------------------------------------------------- | | notNull() | Invalid if value is null or undefined | | notEmpty() | Invalid if it is not a string with lengh greater than zero | | min(x) | Invalid if string length is less than x | | max(x) | Invalid if string length is greater than x | | greaterThanZero() | Alias to greaterThan(0) | | greaterThan(x) | Invalid if not greater than x | | lessThan(x) | Invalid if not less than x | | email() | Invalid if not email address | | match(regex) | Invalid if does not pass your custom regular expression | | phone(allowBlank) | Invalid if not a phone number | | numericString() | Invalid if not a string of integers | | boolean() | Invalid if not true or false | | strongPassword() | Invalid if password is weak | | oneOf(valuesArray) | Invalid if it does not match one of the array values |

Thank you to these dependencies

• owasp-password-strength-test
• sentence-case
• validator