Svelte with Test Driven Development

Build a sign up page in Svelte with test driven development, handle form inputs with state and reactive declarations, style components, submit data via fetch or axios, and test interactions.

Build the sign up form with username, email, password, and password repeat, plus a sign up button, while using describe blocks and label-based tests for accessibility and correctness.

Learn to build form submissions in a Svelte app by wiring an API post with axios, mocking calls in tests, and preventing default submit behavior.

Explore mocking strategies in Svelte with test driven development by swapping axios for browser fetch, validating requests, and using MSW to intercept and test real user interactions.

Discover how to proxy frontend requests to a backend using a rollup plugin dev, configure the proxy in rollup, and route API calls seamlessly across environments.

Showcase a sign up success layout that displays the activation email prompt after sign up, with test-driven checks of text presence, conditional rendering, and bootstrap styling.

Refactor tests by extracting repetitive server setup into lifecycle functions, using before all and before each to initialize and reset state, and wait for text results to improve reliability.

Address test order dependencies by decoupling tests and ensuring predictable, isolated environments. Reset server handlers before each test and refine the signup flow to reliably handle 200 and 400 responses.

Enhance the Sinon page by handling validation and showing backend error messages under inputs. Clear errors on change, and introduce a custom element for username, email, password, and password repeat.

Demonstrates displaying validation errors from a 400 bad request under username, email, and password fields during sign up, using a test-first approach to map api errors to the user interface.

Restore the button state by tying the spinner visibility and enablement to an API progress flag, ensuring the spinner hides after responses and the button enables after the API completes.

Extract the input behavior into a reusable component, wire it to sign up fields with label, id, bound entry, and help text, and ensure tests pass.

Explains styling inputs for validation errors with a red border and is-invalid class, using Bootstrap or custom styles, and discusses testing the input component with Svelte Testing Library.

Demonstrates implementing and testing remaining field validations in a Svelte with test driven development course, displaying email, username, and password errors and using dynamic tests to cover multiple cases.

Learn client-side validation in a Svelte app by implementing password match checks for sign up, displaying mismatch errors, and driving UI behavior with tests and reactive state.

Demonstrates the problem of persistent validation errors on a sign-up form. Shows how to hide errors by updating the errors object when username, email, or password changes.

Replace bind usage with an event listener and custom events in a Svelte app, enabling input change forwarding and centralized form state for username, email, password, and password repeat.

Enable internationalization in the app by adding i18n support, toggling languages, updating the layout, and using the locales folder for language translations.

Explore dynamic language switching on the sign up page through internationalization tests, asserting English and Turkish translations, a language toggle, and flag icons that update all visible text.

Learn to extract a reusable language selector component from the signup page, integrate it across pages, and manage internationalization state in tests with proper setup and cleanup.

Learn to implement and test client-side local validation messages across languages in a Svelte app using test driven development, including password mismatch translations in Turkish and English.

Learn to implement internationalization by sending a language header with API requests, update axios on locale changes, and drive tests with MSW and test-driven development.

Refactors the signup flow by moving api calls to a dedicated module and using post axios with async/await and try-catch to handle success and 400 validation errors.

Style and test a bootstrap nav bar in a Svelte app, converting links into a responsive, always-expanded navigation with a brand, right-aligned links, and a light shadowed header.

In Svelte with test driven development, create an account activation page that uses a dynamic token from the activation URL, wire it to routing, and validate visibility through tests.

Create and reuse a spinner component in Svelte, with a size prop defaulting to small, applying dynamic classes to pages like sign-up and account activation, and verify tests pass.

List users with pagination on the homepage and open a user page with transition effects. Display a cart and image, and render spinner, profile, or error based on API requests.

Implement a get page helper to simulate backend pagination in tests, slice the user list by page and size, and read page and size from request parameters with defaults.

Implement and test next and previous page navigation for a paged user list, with conditional links, zero-based paging, and a unified load data function using a page parameter.

Style next and previous buttons with bootstrap classes, place them at left and right bottom corners, and apply in and out fade and fly transitions; remove out animations for tests.

Link to the user page by testing redirection from the user list. Replace the link with a navigate-based anchor using dynamic path user/{id} to ensure tests pass.

Display default profile images for users using a user-list-item component and binding a user prop; style images as 30px rounded circles with a shadow, swapping to actual images when available.

Master how unique keys in a Svelte keyed each prevent stale state in a user list by using reactive image handling and component reuse.

Implement a progress spinner for the user list during API calls in a Svelte app, controlled by a pending API flag and tested to show during loading and hide after.

Build a ProfileCard component to display user data on a dynamic user page, fetch the user by id via an API call, and validate rendering with tests.

In Svelte with test-driven development, this lecture shows displaying a spinner during an api call that loads the user profile. Once the call resolves, it renders the profile card.

Implement and test a user not found flow in a Svelte app using test-driven development, displaying backend error messages and alert feedback.

Implement the login page like the sign up page, using a reusable button component, a card layout with slot content, and dynamic routing that redirects to the homepage after login.

Create the login form and its test suite in svelte with test driven development, mirroring the sign-up tests to validate the header, inputs, password type, and a disabled login button.

Demonstrate surfacing authentication errors in a test-driven Svelte app by displaying the server message from the response and updating visibility as users edit inputs.

Learn how to implement post-authentication navigation in a Svelte app using test-driven development. Use routing with navigate to redirect from login to the home page after a successful authentication.

Refactor the login and signup flows by extracting a reusable button with progress component that accepts text, disabled, apiProgress, and onClick, uses a spinner and a slot for button content.

Demonstrates building a reusable card component in Svelte with named and default slots to compose header, body, and footer, and applies conditional rendering based on slot usage across pages.

Implement client state management in a svelte app by persisting login state in local storage and reflecting the logged-in user with readable and writable stores across components.

Master test driven development by building a global store to track login status. Update the navigation with dynamic my profile links based on the logged-in user id.

Demonstrate persisting login state with local storage in a Svelte app, using JSON stringify and parse, and ensure test isolation by clearing storage after each test.

Create a storage abstraction to replace direct local storage usage in tests, introducing a storage module with set item, get item, and clear that handle JSON serialization and errors.

Learn to encrypt data stored in local storage in a Svelte app using the secure library, including install, set and get item operations to keep user credentials unreadable.

Store user credentials and authorization data in the app state and local storage, including id, user name, image, and token, and set the authorization header for API requests in tests.