Forem: Lisandra

Accelerate Your Coding and productivity with Emmet

Lisandra — Thu, 29 Feb 2024 07:30:00 +0000

What exactly is Emmet?

Emmet is a powerful toolkit for developers, serving as a plugin for numerous text editors and drastically enhancing HTML & CSS workflow. It's not just fast – it's lightning-fast. In fact, it boldly claims to be the "essential tool for web developers".

Emmet revolutionizes the concept of snippets by introducing expressions that are dynamically parsed. This means that you can type in abbreviations and watch as Emmet magically generates output based on your input. It's like having a coding genie at your fingertips!

The VS Code team recognized Emmet's incredible success and decided to integrate it directly into their text editor. Now, Emmet comes pre-installed in VS Code, making it a seamless part of your coding environment. Say goodbye to slow, tedious typing and hello to lightning-speed coding.

So, how exactly does Emmet boost your coding speed?

It's all about the abbreviations. With Emmet, you can whip up entire blocks of code in the blink of an eye. Once you master Emmet's abbreviations, you'll be amazed at how much your productivity soars. It's a small effort with a big payoff – the epitome of smart coding.

Let's generate HTML code with Emmet!

1- HTML template
With Emmet you can quickly create an HTML template with just one click, simply type ! and you will see that Emmet has appeared as a suggestion. Now press Enter. There you have it, a basic blank HTML web page ready to use.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

</body>
</html>

2- Classes
Emmet uses the same way to refer to classes using a .. To define a class along with the tag, simply add it like this:

div.wrapper or
.wrapper

And the result will be the following:

<div class="wrapper"></div>

It is also possible to add many classes by using the next syntax:

div.wrapper.center or
.wrapper.center

And as result:

<div class="wrapper center"></div>

3- ID
The IDs work in a very similar way, for example:

div#header-content

<div id="header-content"></div>

Up to this point, let's try the combination of everything we have already seen

div#header-content.wrapper.center or
#header-content.wrapper.center

And this is what is going to look like:

<div id="header-content" class="wrapper center"></div>

4- Attributes
We can also specify attributes for the HTML elements like:

img[src="dog.jpg"][alt="dog picture"]

And as result we have:

<img src="dog.jpg" alt="dog picture">

5- Content
To include content inside an HTML tag, we simply wrap the content in curly braces, { }. For example:

p{Content here}
a{Content here}

Then we have:

<p>Content here</p>
<a>Content here</a>

6- Sibling and child tags
This is getting much better! We can also specify sibling and child tags using the characters + and >.

For sibling tags:

p+p

<p></p>
<p></p>

And for child tags:

ul>li


<ul>
    <li></li>
</ul>

7- Group
If your structure is very complex, you may want to group tags together to make it more readable.

div>(header>ul>li>a)+(footer>p)

And the result is:

<div>
    <header>
        <ul>
            <li><a href=""></a></li>
        </ul>
    </header>
    <footer>
        <p></p>
    </footer>
</div>

8- Multiplication and $
We can generate multiple HTML elements by multiplying (*) and numbering elements in sequence using a dollar sign ($).

ul>li*5

<ul>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
</ul>

ul>li{Item $}*3

<ul>
    <li>Item 1</li>
    <li>Item 2</li>
    <li>Item 3</li>
</ul>

9- Starting from an specific number with @

ul>li.item$@3*5

<ul>
    <li class="item3"></li>
    <li class="item4"></li>
    <li class="item5"></li>
    <li class="item6"></li>
    <li class="item7"></li>
</ul>

10- Lorem Ipsum
"Lorem Ipsum" is dummy text used by developers to represent data on a page. Simply type loremand press Enter. Emmet will generate 30 words of dummy text that you can use as filler in your project.

lorem

Lorem ipsum dolor sit amet consectetur adipisicing elit. Illum, nobis? Commodi non delectus nostrum optio expedita eveniet vero nesciunt eaque facilis animi odio culpa deleniti sint, quas error ipsa ipsum.

It is also possible to define the number of words generated.

lorem10 will give you 10 words of random text:

lorem10

Lorem ipsum dolor sit amet consectetur adipisicing elit. Ab, odit!

It is time to apply all what we have learned

Let's try to use everything we have described until now:

div>(ul.my-element>li.item$@1*5>lorem20)+(btn{Click me}.click-btn)

<div>
    <ul class="my-element">
        <li class="item1">Lorem ipsum dolor sit, amet consectetur adipisicing elit. Ullam recusandae consequatur nam accusantium velit atque ut, repudiandae porro iure explicabo?</li>
        <li class="item2">Nemo distinctio, quam tempore amet aliquam dignissimos, officiis qui libero alias quae incidunt dolore voluptatum ipsam voluptatibus corrupti nesciunt modi.</li>
        <li class="item3">Deleniti officiis provident placeat ea iure odio sit, repudiandae ipsam nihil ipsum, praesentium tenetur voluptatem. Exercitationem aperiam labore accusamus illo!</li>
        <li class="item4">Eos dolorum velit, ut enim unde quam, quisquam aperiam voluptatibus, modi quae maiores minus soluta vel? Sunt quae voluptatibus quia?</li>
        <li class="item5">Qui quaerat harum adipisci cumque numquam? Ducimus hic in, architecto dolore explicabo excepturi necessitatibus, repellendus, cum eaque neque dolor reprehenderit?</li>
    </ul>
    <button class="click-btn">Click me</button>
</div>

Conclusion

With Emmet, you can generate a highly complex HTML structure in just one line. It's truly amazing. And it also works seamlessly with CSS.

The examples presented are some of the Emmet abbreviations that I commonly use in my daily life, but of course there are many more that you may also find interesting. Don't forget to check the Emmet Cheat Sheet for a long list of what you can do with this tool.

I hope the information provided was engaging and insightful for you. Always strive to simplify your work and improve productivity by leveraging tools and smart techniques in order to make your professional life easier and more efficient.

Handling Asynchronous Errors Like a Pro

Lisandra — Mon, 26 Feb 2024 06:30:00 +0000

Asynchronous operations, such as fetching data from external APIs or handling user interactions, introduce complexities that demand error handling strategies. In this guide, we will delve into the art of mastering asynchronous error handling, exploring best practices to fortify our applications against the onslaught of errors.

Try-Catch with Async/Await:

The dynamic duo of try-catch blocks and async/await syntax offers a robust solution for handling errors in asynchronous code. By encapsulating asynchronous operations within a tryblock, developers gain the ability to gracefully catch and handle errors that may occur during execution.

async function fetchData() {
  try {
    const response = await fetch('https://api.example.com/data');
    const data = await response.json();
    return data;
  } catch (error) {
    console.error('Error fetching data:', error);
    throw error; // Re-throw the error to propagate it further
  }
}

In this example, the try-catch block envelops our asynchronous code, enabling us to capture and log errors that arise during the fetching of data. By re-throwing the error, we ensure that it propagates further up the call stack, facilitating comprehensive error handling throughout our application.

Promise.catch():

The Promise.catch() method serves as a stalwart guardian against asynchronous errors, offering a concise solution for handling promise rejections. By appending a .catch() clause to our promise chain, developers can intercept and handle errors that occur during the execution of asynchronous operations.

fetch('https://api.example.com/data')
  .then((response) => response.json())
  .then((data) => {
    // Process the data
  })
  .catch((error) => {
    console.error('Error fetching data:', error);
    // Display a user-friendly error message
    alert('An error occurred while fetching data.');
  });

In this snippet, the .catch() method intercepts any errors that occur during the fetching and processing of data, allowing developers to log the error for debugging purposes and provide users with a friendly error message.

Global Error Handling for Unhandled Promise Rejections:

In addition to local error handling techniques, for unhandled promise rejections, it is possible to also implement global error handling by using the unhandledrejection event. By Using this event, developers can capture and handle promise rejections that occur without a corresponding rejection handler.

// Setup global error handling for Unhandled Promise Rejections
process.on('unhandledRejection', (reason, promise) => {
  console.error('Unhandled Rejection at:', promise, 'reason:', reason);
  // Additional logging or error handling can be added here
});

// Example of a Promise that is not handled
const unhandledPromise = new Promise((resolve, reject) => {
  reject(new Error('This Promise is not handled'));
});

// Uncomment the line below to see the global error handling in action
// unhandledPromise.then(result => console.log(result));

// Example of a Promise with proper error handling
const handledPromise = new Promise((resolve, reject) => {
  reject(new Error('This Promise is handled'));
});

handledPromise
  .then(result => console.log(result))
  .catch(error => console.error('Error:', error));

In this example, the unhandledrejection event is utilized to log unhandled promise rejections globally, providing insight into any promises that are rejected without being handled appropriately. Additionally, two promises are demonstrated—one without proper error handling and one with a catch clause to handle errors gracefully.

Conclusion

In summary, handling errors, specifically asynchronous ones, in React applications requires a multi-faceted approach. By taking preventive measures, implementing global error handling, and communicating clearly with users, you can enhance the reliability and usability of your apps. Remember to prioritize simplicity in error messages and keep users informed. Stay updated with React's latest features and best practices to ensure your applications remain resilient and stable in the face of challenges.