Accessing form elements

JavaScript course · Intermediate · Lesson 54/134

Learn to access form and input elements via form.elements and querySelector.

Accessing form elements

To reach a <form> element from JavaScript, you use document.querySelector. The form element's elements property gives all input fields inside the form as a collection.

const form = document.querySelector('form');
const inputs = form.elements;

The elements collection lets you reach fields by name or index. This property exists only on form elements; it is not on other elements. The collection is a good starting point for working with forms.

Selecting a single field with querySelector

To reach a specific input field, you can use querySelector to select it. Selecting by the name attribute is the most common approach.

const email = document.querySelector('input[name="email"]');

This method returns a single element. To walk all fields of a form, you use the elements collection; to pick one field, you use querySelector. Both serve the same goal; pick whichever feels easier.

Exercise Read the email field and log it

The form variable points to a <form> element. From the form.elements collection, assign the field named 'email' to an email variable and log its value with console.log.

Show example solution

const email = form.elements['email'];
console.log(email.value);

Test yourself

Which gives the collection of form fields?

const form = document.querySelector('form');
// A
const a = form.children;
// B
const b = form.elements;
// C
const c = form.inputs;
// D
const d = form.fields;

Show answer

B — Correct! The form.elements property exists only on forms and gives all fields.

Get the email field from elements

const form = document.querySelector('form');
const email = form.____['email'];

Show answer

const form = document.querySelector('form');
const email = form.elements['email'];

Match methods to their meanings

document.querySelector('form')

Selects the form element
form.elements

Gives all fields
form.elements['email']

Returns a field by name

Accessing form elements