How to create a login form in Svelte

Svelte is an open-source JavaScript framework created by Rich Harris in 2016. It is used to build high-performance and efficient web applications. It also offers an efficient way to create forms. Forms are important for user interaction in web applications as they can facilitate the users with logins, registrations, and feedback submissions. Svelte is useful in creating forms due to its reactivity, simplicity, and handling form state.

Expected result

Before creating a login form in Svelte, let’s look at the output below to understand how the form should look.

Getting Started

To build a login form in Svelte, we need to define a few things.

• JavaScript logic of the form component

• The HTML structure of the form component

• Component style using CSS

JavaScript logic of the form component

In Svelte, the key to developing interactive web apps is creating/defining a Svelte component. This component contains the main JavaScript logic of our login form.

HTML structure of the form component

This section describes the component's HTML structure, which includes the login form, button, and other relevant elements.

Style of the form component

Styling plays a crucial role in creating a login form that is user-friendly and visually appealing. The code snippet below adds some style to our login form application.

Complete code

The complete code is given below in the src/App.svelte file. By clicking the “Run” button, we can see our login form application.

Note: It will print Login successful only if the value of both the usrnme and paswrd fields is set to educative. Otherwise, it will throw an error.

In this Answer, we learned how to create a login form in Svelte, which is an essential step in developing interactive web apps. Svelte’s reactive and component-based approach makes it easy to implement such forms.