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Editorial Team
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Asked: 2026-06-06T07:30:23+00:00

I have a JavaScript data structure like the following in my Node.js/Express web app:

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I have a JavaScript data structure like the following in my Node.js/Express web app:

var users = [
    { username: 'x', password: 'secret', email: 'x@x.com' }
  , { username: 'y', password: 'secret2', email: 'y@x.com' }
];

After receiving posted form values for a new user:

{ 
  req.body.username='z', 
  req.body.password='secret3', 
  req.body.email='z@x.com'
}

I’d like to add the new user to the data structure which should result in the following structure:

users = [
    { username: 'x', password: 'secret', email: 'x@x.com' }
  , { username: 'y', password: 'secret2', email: 'y@x.com' }
  , { username: 'z', password: 'secret3', email: 'z@x.com' }
];

How do I add a new record to my users array using the posted values?

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1 Answer

  1. Editorial Team

    You can use the push method to add elements to the end of an array.

    var users = [
    { username: 'x', password: 'secret', email: 'x@x.com' }
  , { username: 'y', password: 'secret2', email: 'y@x.com' }
];

users.push( { username: 'z', password: 'secret3', email: 'z@x.com' } )

    You could also just set users[users.length] = the_new_element but I don’t think that looks as good.

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