ensures all required parameters are not null, or throws a useful error like 'phone is required'
npm install required-pmensures all required parameters are not null, or throws a useful error like "phone is required"
When I am creating a sign-up form for users, I typically ask for First Name, Last Name, email, phone, address.
Some of these fields are required and we would not allow the sign up to proceed until they are filled in. required-pm
simplifies the error checking process and returns meaningful messages when a required field is not filled in.
js
const required = require('required-pm').throwfunction signUp(firstName, lastName, phone, email, address) {
// firstName, lastName and email are required fields
required({firstName, lastName, email})
// ..... the rest of code
}
`Just one line of code, and
would check all these fields to ensure they are not null or undefined, and
throws meaningful error like firstName is required if a field is null.
Customizable
An optional parameter can be used to customize what require-pm checks for.
E.g. checks for
undefined only
`js
required({firstName, lastName, email}, 'u')
`checks for
, null and ''
js
required({firstName, lastName, email}, 'snu')
`checks for
, null, '', false and 0
js
required({firstName, lastName, email}, 'snzfu') // I was shooting for snafu :)
`$3
Instead of throwing errors, required-pm can return the list of empty fields instead
js
const required = require('required-pm').listfunction signUp(firstName, lastName, phone, email, address) {
required({firstName, lastName, email}) //=> returns the list of empty fields instead of throwing an error
// ..... the rest of code
}
``