 Courses from Sara Vieira

React is one of the web’s most popular frameworks for building JavaScript applications. 

If you know what you’re doing, React can drastically simplify how you build, use, and maintain code.

Whether you’re a React newbie or you’re ready for advanced techniques, you can level-up with egghead. Explore our in-depth courses, lessons, and community resources to build more powerful applications and crack open your career.

react

In this lesson, we will use the  `@reach/router` library to create navigation that will take us to different pages in our application.

We will create a homepage and about page and switch between these without page re-renders

Create navigation between pages using  `@reach/router`

In this lesson, we will add url parameters to our application using the  `@reach/router` library.

We will use the example of getting the `username` prop from our location to greet a user.

Use url parameters in  `@reach/router`

In this lesson, we will be adding routing and two routes (homepage and about page) to a React application using the  `@reach/router` library

Add routing to your React Application using `@reach/router`

In this collection, we will dive into using  `@reach/router` as a routing option for your React application. We will start from the beginning and cover everything from Links to Nested Routes.

Using  `@reach/router` for navigation in React Apps

We will learn about the `css` prop we have at our disposal in `styled-components` to change the style of a component right in the render function.

We will use this prop to override the text color of a button with the one we define in this prop.

Using the `css` prop to define styles in Styled Components

Since now we know that we can add functions to our styling, we can do so much. Here we have a json file with a list of the 20 worst movies on IMDB. We can actually change the colors of our list using `if` blocks.

We will take a look at how to style your components very granularly based on their props. We will style a component based on a float value, string, and its position in the array.

Style a component based on complex props with Styled Components

We will learn how to use the `styled-components` library using the object notation instead of template strings.

To use object notion, we will replace our backticks with a function and we can use props to change our elements. 

We will go through a heading and transform it from template literals, backticks, to objects.

Use Styled Components with the Object syntax

We will learn about the `attrs` method that allows us to change and add attributes to our styled elements.

We have the two buttons that we made in a previous lesson. We can add `.attrs` onto our `styled.button` to be able to add on types. `attrs` can return an object or a function. We will see the difference between the two and why you would use one over the other.

Use the `attrs` method to add HTML attributes in styled-components

In this lesson, we will use the `as` prop to reassign the HTML tag that is associated with one of our styled components.

The `as` prop will be used to reassign a `button` element to be an `a` element

Using the `as` prop to reassign the HTML tag

We will use the `styled-components` library to go over how to style pseudo-selectors and classes.

The pseudo-selectors, such as `hover` and `before`, work the exact same as regular CSS. In our `element` or `class` styling backticks, we can set them like `:hover{}` and `:before{}` to change what the element or component does.

Style pseudo-selectors and classes in Styled Components

We will integrate a theme in our small app using `styled-components` and the `ThemeProvider`.

In the `index.js` file, where you have your `App` component being rendered, we will wrap it with the `ThemeProvider`. We can set some colors to an object and call it `theme`. We set that `theme` to be the `theme` prop inside of our `ThemeProvider`. 

Now over in our `App.js` file, we can gain access to those colors stored in our theme by setting `color: ${props => props.theme.colors.purple};`. We can change any `css` in that `theme` object and get access to that wherever we want.

Create and use a Theme in Styled Components

JavaScript® (often shortened to JS) is a lightweight, interpreted, object-oriented language with first-class functions, most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic, and supports object-oriented, imperative, and functional programming styles.

javascript

We will be using the `keyframes` function from styled-components to animate the position and rotation of an `h1`.

Like styling using the global variable, we set the `keyframes` keyword to a variable and inside of the backticks, we set what we want our `element` to do. Then in a custom `element`, we set `animation` to our custom `keyframes` variable.

Animate Styled Components in React

We are going to learn how to add styles to a react component using the `styled-components` library.

We will get a list of people and give a different color and background color when their position in the list is an even number, like zebra stripes. 

Inside of the backticks for our custom styled element, we can interpolate and add in a function that checks if the name in our array is at an even position, it’ll change the text color to white and the background color to black.

Adjust Style based on props with Styled Components

We will create global styles that apply to the whole document using the `styled-components` library. 

We create a global style using the `createGlobalStyle` keyword and set that to a variable. Inside of that variable, we can now set our custom styles. We wrap our application in inside of a fragment, `<>`, and put our new global style up at the top, just below the fragment.

Creating Global Styles with Styled Components

We are going to learn how to add styles to a react component using the `styled-components` library.

I've done a lesson on how to [Style an HTML Element with Styled Components](https://egghead.io/lessons/react-style-an-html-element-with-styled-component) but now it's time to style React Components. We'll be able to wrap a React component in a styled component to extend the style of that component.

To style an HTML Element, you would do `styled.{element}` but with a component, you would replace the `.` with a `()` so it would look like `styled({component})`

Here, we will style a button from `material-ui` and adjust his size with css.

Style a React Component with Styled Components



In the course, we will learn how to use the `styled-components` library to style our React applications. We will start from the basics and dwell in more advanced cases.

With this course, you can get the necessary knowledge to use the `styled-components` library to style your React applications in the future.



Styling React Applications with Styled Components

We are going to learn how to make our first component using the `styled-components` library.

We'll use `styled.h1` to create a `<h1>` component and adjust it's font-family, positioning and color with css.

Style an HTML Element with Styled Component

Stop waiting for a single AI agent! This lesson demonstrates a powerful workflow to massively parallelize your AI-driven development in Cursor. Learn how to use tools like `file-forge` to package your project context, prompt advanced AI models (like Gemini in AI Studio) to brainstorm features and generate setup scripts, and then leverage a custom `git worktree` CLI tool (`wt`) to automatically launch an "army" of isolated Cursor instances, each tackling a different task on its own branch.

**Workflow Demonstrated / Key Benefits:**

*   **Bundle Project Context:** Use `file-forge` to create an AI-friendly representation of your codebase.
*   **AI-Powered Brainstorming & Scripting:** Prompt a reasoning model (e.g., Gemini via AI Studio) to suggest features *and* generate a shell script (`zsh`/`bash`) to automate setup.
*   **Automated Worktree Creation:** Execute the generated script which uses a custom `git worktree` CLI (`wt`) to:
    *   Create new branches and worktrees for each suggested feature.
    *   Install dependencies automatically (e.g., `pnpm install`).
    *   Launch multiple, isolated Cursor instances.
*   **Parallel AI Development:** Assign different features or implementation approaches to each Cursor agent (Composer) simultaneously.
*   **Efficient Monitoring:** Easily switch between active Cursor projects/worktrees using `Ctrl+R` or OS spaces.
*   **Seamless Integration:** Merge completed features back into your main branch using `wt merge` or use agents to commit, push, and create Pull Requests via the GitHub CLI (`gh pr create`).
*   **Boost Productivity:** Dramatically speed up iteration and experimentation by running multiple AI agents concurrently without conflicts.

This approach transforms your workflow, allowing you to explore multiple development paths simultaneously and integrate the best results efficiently using standard Git practices.

**Resources** 

https://www.npmjs.com/package/@johnlindquist/worktree
https://www.npmjs.com/package/@johnlindquist/file-forge

**Want to Learn More? Sign-up for my Cursor Workshop!**

https://egghead.io/workshop/cursor

John Lindquist

Swarm Intelligence: Massively Parallelize Your AI Agents in Cursor

Creating powerful and context-aware tools for Cursor IDE becomes straightforward when leveraging information directly from your current project. In this lesson, you'll learn how to build a custom MCP (model context protocol) tool that intelligently requests essential details—such as the current project path and conversation summaries—from your Cursor project.

Workflow demonstrated in this lesson:

- Define MCP tool parameters to request specific project details.
- Pass project path and conversation summaries into your MCP tool.
- Automatically write or update files within your current project using these parameters.

Key benefits:

- Automate tasks with precision based on your active project's context.
- Simplify interactions by creating AI-driven CLI commands tailored to your needs.
- Open endless possibilities for integrating external APIs and advanced automation.

Through this practical demonstration, you'll gain a versatile technique for enhancing your development workflow in Cursor IDE.

[https://github.com/johnlindquist/mcp-cursor-tool-starter](https://github.com/johnlindquist/mcp-cursor-tool-starter)

Build MCP Tools Using Project Context for Custom Cursor IDE Automation

Setting up custom MCP (Machine Command Protocol) servers in Cursor can involve tedious steps, such as configuring node paths or referencing additional commands. This lesson shows how to streamline this process by bundling your MCP server directly into a standalone executable.

Workflow demonstrated in this lesson:

- Use a simple MCP server project starter.
- Run a single bundling command to create an executable.
- Right-click the generated executable, copy its full path, and add that directly to your Cursor settings.

Key benefits:

- Eliminates the need for complex node path configurations.
- Simplifies the setup and integration of custom MCP servers into Cursor.
- Makes the server executable instantly accessible within your Cursor environment.

By following this streamlined approach, you can quickly and easily integrate custom MCP servers into Cursor, making your development workflow cleaner and more efficient.

[https://github.com/johnlindquist/mcp-cursor-tool-starter]()

Easy MCP Server Setup in Cursor IDE with Bundled Executables

TanStack Router is the foundation for TanStack Start, which is gaining significant attention due to its innovative approach to application development.

This course focuses on getting effective TanStack Router, a modern and scalable routing solution for React applications. You will learn how to:
- set up and scaffold new applications,
- use file-based routing
- create nested routes
- manage dynamic route parameters and more.

The course covers advanced features like route loaders, caching strategies, and lifecycle hooks, which are crucial for enhancing application performance and user experience.

By understanding TanStack Router, you can build more efficient, type-safe, and maintainable applications, leveraging its integration with data fetching libraries like TanStack Query.

This knowledge is essential for developers looking to improve their routing skills and stay ahead in the field.

Tomasz Ducin

Up and Running with Tanstack Router and React

Learn TanStack Router for React: set up apps, use file-based routing, manage routes, and boost app performance.


In this lesson, we explore how TanStack Router integrates with the [native browser history API](https://developer.mozilla.org/en-US/docs/Web/API/History) to manage navigation.

As we navigate through different routes, the URL changes are stored in the browser's history, allowing users to use the forward and backward buttons to traverse their navigation history.

This functionality also **enables permalinks**, meaning users can copy and paste URLs to access specific routes directly.

Additionally, we learn how to programmatically interact with the history object to move forward or backward through the navigation stack, enhancing the user experience by providing full control over navigation actions.

This compatibility with the native history API ensures that TanStack Router applications behave similarly to traditional websites, offering a seamless and intuitive user experience.

Browse History in Tanstack Router

Browse history in TanStack React Router using the native history API for seamless navigation

In this lesson, we explore how to hook into TanStack Router's lifecycle hooks to execute custom logic during route changes.

The hooks we'll look into are: `onEnter`, `onStay`, and `onLeave`, which are triggered when entering, staying within, or leaving a route, respectively.

All hooks receive a detailed match parameter, providing information about the route's path, ID, and tons of other details.

This allows for the implementation of features like animations or logging when navigating between routes.

We also learn how to use these hooks to track and manage state changes as users interact with the application, making it easier to implement complex behaviors based on route transitions.

Hook into Route Lifecycle Hooks in Tanstack Router

Hook into TanStack React Router's lifecycle hooks for custom route logic and animations.

In this lesson, we learn how to handle not found errors in TanStack Router by using the `notFoundComponent` at both nested and global levels.

To trigger the display of a `notFoundComponent`, we must throw a specific error using the `notFound` function within a loader or other lifecycle method of a route. This approach allows us to provide custom error messages for specific routes or globally across the application.

We explore how to define a notFoundComponent within a specific route's configuration and how to set a `defaultNotFoundComponent` at the router global level, which applies to all routes unless overridden locally. This flexibility ensures that users receive meaningful feedback when encountering non-existent routes.

Provide NotFoundComponent at Nested Route or Global Level in Tanstack Router

Handle notFound errors in TanStack Router with notFoundComponent at nested or global levels.



In this lesson, we learn how to access dynamic route parameters using the `useParams` hook in TanStack Router.

When used with a specific `Route` object, `useParams` provides type-safe access to route parameters, ensuring that TypeScript knows the exact types of these parameters.

This approach eliminates the possibility of undefined/optional values, making it safer for accessing parameters like `employeeId`.

However, when using `useParams` globally without specifying a route, it requires an options object with `{ strict: false }`, which reduces type safety.

In this case, the hook can access parameters from any route in the application, but it does not guarantee their existence or type. This flexibility allows components to be reused across different routes, but it requires careful handling of potential errors.



Access Dynamic Route Parameters with useParams in Tanstack Router

Access dynamic route parameters with useParams in TanStack React Router for type-safe routing.

In this lesson, we learn how to reorganize file-based routes in TanStack Router to accommodate nested routing structures.

We explore how to create additional nested routes by converting files into directories, allowing for further nesting.

For example, to create a nested route like `/employees/$employeeId/edit`, we can create a **directory** (!) named `$employeeId` and place an `index.tsx` file inside it to define the route component for this nested route.

This approach provides flexibility in organizing files while maintaining the convention that file names and locations align with route paths. We also see how to adapt existing components and loaders to work with these reorganized routes, enabling features like edit forms or delete actions (or whatever) within nested routes.


Reorganize File-Based Routes in Tanstack Router

Reorganize file-based routes in TanStack Router for flexible nested routing.



In this lesson, we learn how to parametrize the loader for a nested route in TanStack Router.

We focus on a nested route like `/employees/$employeeId`, where the `$employeeId` is a **dynamic parameter**.

To fetch data for this route, we use a `loader` function that accesses the `$employeeId` parameter. This is achieved by using the params object available in the `loader` function, which contains the dynamic segments of the URL. We then use this parameter to call a function like `getEmployeeById`, which fetches specific employee details from an API.

We highlights that TanStack Router **automatically infers types** for these parameters, ensuring type safety for nested routes.

Parametrize Route Loader for Nested Route in Tanstack Router

Parametrize nested route loaders in TanStack Router using path parameters

Sara Vieira

Search Results

Create navigation between pages using `@reach/router`

Use url parameters in `@reach/router`