In this course, you will learn to build a fully-functional application with Rails Webpacker, Webpack, and TypeScript.

railspostgresssl.tar.gz

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stimulus/01

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react/01

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testing/01

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all_react/01

introduction/01_testing

testJob

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In this course, you will learn to build a fully-functional application with Rails Webpacker, Webpack, and TypeScript.

To kick things off, you’ll walk through the basics of getting Rails set up to use Webpacker which will serve JavaScript and CSS to the browser. You’ll then get acquainted with Stimulus and React which will help with creating richer interactions.

In the latter half, you’ll work with TypeScript and set up communication between a server. Beyond that, you’ll work through managing state in your Stimulus code, as well as how to test and troubleshoot your application.

By the end of this course, you will be well equipped to create larger, more complex applications that make use of modern tools.

Modern Front-end Development for Rails

Which of the following concepts does NOT allow you to alter the display of existing CSS fields?

Which of the following concepts does NOT allow you to alter the display of existing CSS fields?

It will add an image to the element that it is used in.

It will set the given image as the background of the entire `window`.

Suppose you have the following CSS:
~~~css
.background-arrow {
  background-image: url("../images/arrow.svg");
  width: 25px;
  height: 25px;
}
~~~
Which of the following is correct about it?

Suppose you have the following CSS:
<pre><code class="language-css">.background-arrow {
 background-image: url(&quot;../images/arrow.svg&quot;);
 width: 25px;
 height: 25px;
}
</code></pre>
Which of the following is correct about it?

```html



```

```html
<div data-day-toggle-target="buttonText" class="background-arrow">
</div>
```

```html



```

Which of the following HTML elments uses the given CSS properly?
~~~css
.background-arrow {
  background-image: url("../images/arrow.svg");
  width: 25px;
  height: 25px;
}
~~~

_You can pick multiple answers._

Which of the following HTML elments uses the given CSS properly?
<pre><code class="language-css">.background-arrow {
 background-image: url(&quot;../images/arrow.svg&quot;);
 width: 25px;
 height: 25px;
}
</code></pre>
You can pick multiple answers.

Ease in and out of changing the background color over 200ms. The transition completes after 50ms.

Ease in and out of changing the background color over 200ms. The transition starts after 50ms.

Ease in and out of changing the background color over 200ms. The page becomes responsive again after 50ms.

What would this transition statement do: `  transition: background-color 200ms ease-in-out 50ms;`?



What would this transition statement do: <code> transition: background-color 200ms ease-in-out 50ms;</code>?

Quiz Yourself on CSS

Getting Started

Client-side Rails

Stimulus

React

Cascading Style Sheets

TypeScript

Webpack

Webpacker

Talking to the Server

Managing State in Stimulus Code

Managing State in React

Using Redux to Manage State

Validating Code with Advanced TypeScript

Testing with Cypress

More Testing and Troubleshooting Basics

Appendix

Quiz Yourself on CSS