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Python is already used in the back-end of most web-based applications. However, it does not work with the front-end of web browsers in those applications. This is where Transcrypt comes in. Transcrypt can help create more coherent web-based projects where Python is used to write the back-end and front-end. This course is primarily about using a transpiler called Transcrypt. It translates our Python code to JavaScript and then executes that JavaScript, letting us enjoy the neatness of Python with the front-end flexibility of JavaScript.

Using the Python Transcrypt Transpiler for Front-end Coding

**(True or False)** Using asynchronous web server requests allows our application to continue responding to application events while waiting for a response from the web server.

(True or False) Using asynchronous web server requests allows our application to continue responding to application events while waiting for a response from the web server.

What is the value of the variable `response` after making the following function call? 

`response = window.fetch("https://worldtimeapi.org/api/ip")`

What is the value of the variable <code>response</code> after making the following function call?
<code>response = window.fetch(&quot;https://worldtimeapi.org/api/ip&quot;)</code>

What usage of the `React.useEffect()` method runs only one time?

What usage of the <code>React.useEffect()</code> method runs only one time?

**(True or False)** The `then()` and `catch()` methods are methods of a `promise` object.


(True or False) The <code>then()</code> and <code>catch()</code> methods are methods of a <code>promise</code> object.

It displays JSON data in the web browser console window.

It sends the print command to the indicated URL.

It prints out the URL in the web browser console window.

It redirects the web browser to the indicated URL.

What if the result of running the following code?
```js
async def fetch(url, callback):
    response = await window.fetch(url)
    if response.status != 200:
        console.error('Fetch error - Status Code: ' + response.status)
    else:
        data = await response.json()
        callback(data)
fetch("https://worldtimeapi.org/api/ip", print)
```

What if the result of running the following code?
<pre><code class="language-js">async def fetch(url, callback):
 response = await window.fetch(url)
 if response.status != 200:
 console.error('Fetch error - Status Code: ' + response.status)
 else:
 data = await response.json()
 callback(data)
fetch(&quot;https://worldtimeapi.org/api/ip&quot;, print)
</code></pre>

**(True or False)** The keywords `async` and `await` are another way to handle `promise` objects in our code.

(True or False) The keywords <code>async</code> and <code>await</code> are another way to handle <code>promise</code> objects in our code.

Introduction

The Setup

Write a “Hello, World” Application

JavaScript Functions

Sourcemaps

External JavaScript Libraries

Intro to React

React Concepts

Cleaner Code

Managing JavaScript Packages

Package Bundler

Text Input

Lists

Forms

React Components

JavaScript Examples

CSS

Material-UI

Parcel Web Proxy

Asynchronous Requests

React Context Hook

Transcrypt Miscellany

Application Versioning

Google Analytics

Developer Tools

Appendix

Quiz on Asynchronous Requests