Gain insights into Test-driven Development with React. Learn unit and integration testing using Jest and Enzyme, and explore tools like ESlint, Prettier, Babel, Webpack, and Travis CI.

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This course is a deep dive into testing in React. You will learn unit testing and integration testing using tools such as Jest and Enzyme. You will also learn about other tools such as ESlint, Prettier, Babel, Webpack, and Travis CI that add convenience for coding and testing.

Test-driven Development with React

## Origins of CSS

Take a moment to consider the unlikely origins of the web as an app platform. When Tim Berners-Lee wrote the original web server and browser in 1990, web pages were written in a single language: HTML. HTML could only convey raw content. The way that content was presented was left to the browser. Gradually, a handful of stylistic choices were added to the markup language. Authors started to embellish their sites with (often garish) color and font choices, not to mention the infamous `<marquee>` tag. With the introduction of CSS in 1996, the aesthetic choices available to web designers exploded.



# Origins of CSS

Take a moment to consider the unlikely origins of the web as an app platform. When Tim Berners-Lee wrote the original web server and browser in 1990, web pages were written in a single language: HTML. HTML could only convey raw content. The way that content was presented was left to the browser. Gradually, a handful of stylistic choices were added to the markup language. Authors started to embellish their sites with (often garish) color and font choices, not to mention the infamous `<marquee>` tag. With the introduction of CSS in 1996, the aesthetic choices available to web designers exploded.



Learn about the motivation behind CSS-in-JS and more about styled Components.

Introduction to CSS-in-JS

Before We Begin

Test-Driven Development with Jest

Integrated Tooling with VS Code

Testing React with Enzyme

Styling in JavaScript with Styled-Components

Refactoring with Higher-Order Components

Continuous Integration and Collaboration

Conclusion

Introduction to CSS-in-JS

Origins of CSS