@jrc03c/email-validator

Installation

npm install --save https://github.com/jrc03c/email-validator

Usage

In Node:

const EmailValidator = require("@jrc03c/email-validator")

In the browser:

<script src="path/to/dist/email-validator.js"></script>

Then:

const validator = new EmailValidator()

validator.load().then(() => {
  const isValid = validator.validate("[e-mail]")

  if (isValid) {
    // Yay!
  } else {
    // Uh-oh!
  }
})

By default, the top-level domain list is fetched from IANA. However, if you prefer, you can pass your own URL from which to fetch the list:

validator.load(myListUrl)

As I write this, the Fetch API has not yet been implemented in Node; so this library includes its own version written from scratch. My version definitely doesn't implement the full Fetch API; in fact, it's just useful enough to fetch a plain text file from a URL, and that's all. But I wrote it myself because I didn't want to rely on any third-party libraries. If for some reason you are working in Node and you need to fetch the top-level domain list using a more complicated request (e.g., a POST request, or a request that requires certain headers, etc.), or if you just don't just the way I've written my own fetch function, then you'll need to write your own version or import a library like node-fetch and then do your own fetching:

const EmailValidator = require("@jrc03c/email-validator")
const fetch = require("node-fetch")

fetch(myListUrl, myFancyOptions).then(response => {
  const myFancyList = await response.json()

  // parse the response to retrieve your list, and then:
  const validator = new EmailValidator()
  validator.topLevelDomainList = myFancyList

  const isValid = validator.validate("[e-mail]")
  // ...
})

API

EmailValidator

There are no constructor arguments.

Properties

isReady

A read-only property that indicates whether or not a top-level domain list has been loaded into the validator.

topLevelDomainList

A list of top-level domains. (NOTE: I typically think of domains as something like "github.com". But "top-level domains" in this context refers to what I'd otherwise call the "extension" of the domain; i.e., the thing that comes at the end of the domain name, such as "com" in "github.com". So, this top-level domain list should be a list of all such domain name endings.)

Methods

load(url)

Returns a Promise that resolves once a list of top-level domains has been downloaded. Passing a URL into the method is optional. When passed, the top-level domain list will be fetched from the given URL rather than from the default IANA URL. This method is identical to fetchTopLevelDomainList.

fetchTopLevelDomainList(url)

Returns a Promise that resolves once a list of top-level domains has been downloaded. Passing a URL into the method is optional. When passed, the top-level domain list will be fetched from the given URL rather than from the default IANA URL. This method is identical to load.

isValid(email)

Returns a boolean indicating whether or not the given email address is valid. This method is identical to validate.

validate(email)

Returns a boolean indicating whether or not the given email address is valid. This method is identical to isValid.