Posts Tagged Under: css

CSS Grid Areas

I think of named grid areas in CSS Grids as bring-your-own syntactic sugar. You don’t absolutely need them (you could express grid placement in other ways), but it can make that placement more intuitive. And, hey, if I’m wrong about that, correct me in the comments.

 

Say you set up a 3-column grid:

.grid {
  display: grid;
  grid-gap: 1rem;
  grid-template-columns: 
     200px  1fr  1fr;
}

No rows defined there; those are implicit and will

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Building Skeleton Components with React

One of the advantages of building a Single Page Application (SPA) is the way navigating between pages is extremely fast. Unfortunately, the data of our components is sometimes only available after we have navigated to a specific part of our application. We can level up the user’s perceived performance by breaking the component into two pieces: the container (which displays a skeleton view when it’s empty) and the content. If we delay the rendering of the content component until we

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Demystifying JavaScript Testing

Many people have messaged me, confused about where to get started with testing. Just like everything else in software, we work hard to build abstractions to make our jobs easier. But that amount of abstraction evolves over time, until the only ones who really understand it are the ones who built the abstraction in the first place. Everyone else is left with taking the terms, APIs, and tools at face value and struggling to make things work.

One thing I believe

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Using Feature Detection, Conditionals, and Groups with Selectors

CSS is designed in a way that allows for relatively seamless addition of new features. Since the dawn of the language, specifications have required browsers to gracefully ignore any properties, values, selectors, or at-rules they do not support. Consequently, in most cases, it is possible to successfully use a newer technology without causing any issues in older browsers.

Consider the relatively new caret-color property (it changes the color of the cursor in inputs). Its support is still low but that does

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Introducing GitHub Actions

It’s a common situation: you create a site and it’s ready to go. It’s all on GitHub. But you’re not really done. You need to set up deployment. You need to set up a process that runs your tests for you and you’re not manually running commands all the time. Ideally, every time you push to master, everything runs for you: the tests, the deployment… all in one place.

Previously, there were only few options here that could help with that.

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How to Import a Sass File into Every Vue Component in an App

If you’re working on a large-scale Vue application, chances are at some point you’re going to want to organize the structure of your application so that you have some globally defined variables for CSS that you can make use of in any part of your application.

This can be accomplished by writing this piece of code into every component in your application:

<style lang="scss">
  @import "./styles/_variables.scss";
</style>

But who has time for that?! We’re programmers, let’s do this programmatically.

 

Why?

You might be wondering

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Why Using reduce() to Sequentially Resolve Promises Works

Writing asynchronous JavaScript without using the Promise object is a lot like baking a cake with your eyes closed. It can be done, but it’s gonna be messy and you’ll probably end up burning yourself.

I won’t say it’s necessary, but you get the idea. It’s real nice. Sometimes, though, it needs a little help to solve some unique challenges, like when you’re trying to sequentially resolve a bunch of promises in order, one after the other. A trick like this

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Getting Started with Vue Plugins

In the last months, I’ve learned a lot about Vue. From building SEO-friendly SPAs to crafting killer blogs or playing with transitions and animations, I’ve experimented with the framework thoroughly.

But there’s been a missing piece throughout my learning: plugins.

Most folks working with Vue have either comes to rely on plugins as part of their workflow or will certainly cross paths with plugins somewhere down the road. Whatever the case, they’re a great way to leverage existing code without having to

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HTML for Zip Codes

It seems like zip codes are just numbers, right? So…

<input id="zip" name="zip" type="number">

The advantage there being able to take advantage of free validation from the browser, and triggering a more helpful number-based keyboard on mobile devices.

But Zach pointed out that type="number" is problematic for zip codes because zip codes can have leading zeros (e.g. a Boston zip code might be 02119). Filament group also has a little lib for fixing this.

This is the perfect job for inputmodeRead More


Lazy Loading Images with Vue.js Directives and Intersection Observer

When I think about web performance, the first thing that comes to my mind is how images are generally the last elements that appear on a page. Today, images can be a major issue when it comes to performance, which is unfortunate since the speed a website loads has a direct impact on users successfully doing what they came to the page to do (think conversation rates).

In this article I’d like to cover the same topic using data attributes, Intersection

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POSTing an Indeterminate Checkbox Value

There is a such thing as an indeterminate checkbox value. It’s a checkbox (<input type="checkbox">) that isn’t checked. Nor is it not checked. It’s indeterminate.

We can even select a checkbox in that state and style it with CSS!

Some curious points though:

  1. It’s only possible to set via JavaScript. There is no HTML attribute or value for it.
  2. It doesn’t POST (or GET or whatever else) or have a value. It’s like being unchecked.

 

So, say

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The Way We Talk About CSS

There’s a ton of very quotable stuff from Rachel Andrew’s latest post all about CSS and how we talk about it in the community:

CSS has been seen as this fragile language that we stumble around, trying things out and seeing what works. In particular for layout, rather than using the system as specified, we have so often exploited things about the language in order to achieve far more complex layouts than it was ever designed for. We had to, or

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Styling the Gutenberg Columns Block

WordPress 5.0 is quickly approaching, and the new Gutenberg editor is coming with it. There’s been a lot of discussion in the WordPress community over what exactly that means for users, designers, and developers. And while Gutenberg is sure to improve the writing experience, it can cause a bit of a headache for developers who now need to ensure their plugins and themes are updated and compatible.

One of the clearest ways you can make sure your theme is compatible with

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Valid CSS Content

There is a content property in CSS that’s made to use in tandem with the ::before and ::after pseudo elements. It injects content into the element.

Here’s an example:

<div 
  data-done="✅"
  class="email">
    chriscoyier@gmail.com
</div>
.email::before {
  content: attr(data-done) " Email: "; /* This gets inserted before the email address */
}

The property generally takes anything you drop in there. However, there are some invalid values it won’t accept. I

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Using Event Bus to Share Props Between Vue Components

By default, communication between Vue components happen with the use of props. Props are properties that are passed from a parent component to a child component. For example, here’s a component where title is a prop:

<blog-post title="My journey with Vue"></blog-post>

Props are always passed from the parent component to the child component. As your application increases in complexity, you slowly hit what is called prop drilling that is React-focused, but totally applies). Prop drilling is the idea of passing props

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What are Durable Functions?

Oh no! Not more jargon! What exactly does the term Durable Functions mean? Durable functions have to do with Serverless architectures. It’s an extension of Azure Functions that allow you to write stateful executions in a serverless environment.

Think of it this way. There are a few big benefits that people tend to focus on when they talk about Serverless Functions:

  • They’re cheap
  • They scale with your needs (not necessarily, but that’s the default for many services)
  • They allow you to

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Using Recompose to Share Functionality Between React Components

Sharing functionality between React components is a pretty common need. The concept is that we can establish the behavior in one place and then extend it across different components. Higher-Order Components are one way to do this. Yet, there is another way using a library called Recompose.

GitHub Repo

What is Recompose?

The documentation helps us answer that:

Recompose is a React utility belt for function components and higher-order components. Think of

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One Invalid Pseudo Selector Equals an Entire Ignored Selector

Perhaps you know this one: if any part of a selector is invalid, it invalidates the whole selector. For example:

div, span::butt {
  background: red;
}

Even though div is a perfectly valid selector, span:butt is not, thus the entire selector is invalidated — neither divs nor span::butt elements on the page will have a red background.

 

Normally that’s not a terribly huge problem. It may even be even useful, depending on the situation. But there are plenty of situations where it

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Moving Backgrounds With Mouse Position

Let’s say you wanted to move the background-position on an element as you mouse over it to give the design a little pizzazz. You have an element like this:

<div class="module" id="module"></div>

And you toss a background on it:

.module {
  background-image: url(big-image.jpg);
}

You can adjust the background-position in JavaScript like this:

const el = document.querySelector("#module");

el.addEventListener("mousemove", (e) => {
  el.style.backgroundPositionX = -e.offsetX + "px";
  el.style.backgroundPositionY = -e.offsetY + "px";
});

See the Pen Move a

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