#CSSVariables

[asadmukhtarr]

CSS (Cascading Style Sheets) is a styling language used to control the appearance of HTML elements. It allows developers to separate content from design, making web pages more visually appealing and easier to maintain.

[code-passion]

✨ CSS Variables: The Key to Empowering Your Stylesheets ✨

Are you ready to take your CSS skills to the next level?

Discover the magic of CSS Variables and how they can revolutionize your web design process! 🌐💻

In this blog post, you'll learn:

✅ What CSS Variables are and why they matter

✅ How to implement them in your projects

✅ Tips and tricks to maximize their potential

✅ Real-world examples to inspire your designs

Don't miss out on this game-changing technique that will make your stylesheets more dynamic, maintainable, and scalable! 🚀

Read the full article here: CSS Variables : The Key to Empowering Your Stylesheets

Follow:

LinkedIn- Skillivo

[webdesignideas-blog]

Nhắc đến sử dụng biến trong CSS chắc nhiều bạn sẽ nghĩ ngay đến SASS phải không nào ? Bản thân mình trước đây cũng vậy khi sử dụng SASS được một thời gian rồi thì mới nhận ra rằng bản thân CSS cũng hỗ trợ sử dụng biến (CSS variables).

Đây là một kĩ thuật mới xuất hiện kể từ khi CSS3 ra đời và còn chưa phổ biến trong giới lập trình website vì một số trình duyệt chưa hỗ trợ sử dụng biến trong CSS.Nhưng với sự phát triển vũ bão của công nghệ thông tin như hiện nay thì mình tin chỉ trong một thời gian ngắn nữa thôi bạn có thể sử dụng biến trong CSS trên tất cả các trình duyệt.

Bài viết này sẽ bao gồm tất cả những kiến thức cơ bản về biến trong CSS cũng như cách sử dụng và các ví dụ cụ thể để các bạn đọc xong là làm được luôn.Hãy cùng mình tìm hiểu ngay bây giờ nhé.

[dordlebuns]

Day 11: Colors with CSS/Parsing Rabbit Hole

Going straight to it, I have been learning about decimal versus hexadecimal values with CSS coloring. (Decimal being a base of 10 with 0-9 and hexadecimal being a base of 16, adding A-F on top of the 0-9) You can also use shortened hexadecimal values, and the typical formatting for using these values is six digits, two for each color. (RGB)

Speaking of RGB, you can use those values too! By doing:

rgb(0,0,0) for example we would get the color black.

Short and sweet. Now it's time for variables. Variables are powerful because they can be used to change multiple elements in your code at a fast rate. These are defined as such:

--cssvariable: blue;

This gives the variable --cssvariable the color blue that I can then use elsewhere in my code.

Short and sweet again! Now I am spiraling down a rabbit hole of parsers. I'm still confused by them oooh boy. But, I'm going to try to reiterate what I have seen online regarding them.

Parsers are basically ways of organizing and analyzing the data we enter into the rules of grammar. There are usually two steps to parsers: the lexer and the parsing itself. Lexers read and take a line of code, say an expression like <Hello, World!> and turns each individual element into a "token". It also ignores irrelevant information like comments or whitespace. Then, the tokens are handed over to the parser, where parse trees divide the expression into a proper chain of events. A parse tree for the expression 5+5 would have each number and operator separated all leading upward to the expression itself. All of this is the first phase of the compiler, which is what takes our source code and turns it into object code/machine code for the computer to understand. Yeah... still a little lost myself but we'll keep going with our CSS endeavors! Just about done with the CSS basics.

[macronimous]

How to set up site theming with #CSSVariables https://t.co/hlVfWP1qVx https://t.co/9VwCOheKtZ

How to set up site theming with #CSSVariables https://t.co/hlVfWP1qVx pic.twitter.com/9VwCOheKtZ

— Macronimous.com (@macronimous) September 17, 2018

from Twitter https://twitter.com/macronimous September 17, 2018 at 05:33PM via IFTTT

[danielschneider]

Winning with CSS Variables https://t.co/D5PKgfeA2z #css #cssvariables

— HeyDesigner (@HeyDesigner) May 2, 2017

[bobylito]

Bridging CSS and JS with Custom Properties #cssVariable #js https://t.co/yJkdopeDgl

Bridging CSS and JS with Custom Properties #cssVariable #js https://t.co/yJkdopeDgl

— Alex Stanislawski (@bobylito) February 13, 2017

http://twitter.com/bobylito/status/831063362796716032 February 13, 2017 at 09:52AM

[geckotang]

CSS Variables 2014/05/22

2014年1月ごろにCodeGridで、CSS Variablesを使うという記事を書きました。

CSS Variablesは、CSSの中で独自のプロパティを定義し、その値を変数として使うことができるという仕様です。

ちなみに、今はその記事中にあるサンプルはどれも動きません。かなしいね。

間違いとか、ご意見ありましたら @GeckoTangまでどうぞ。

カスタムプロパティの接頭辞が変わった

以前は以下の様に、varを接頭辞としてカスタムプロパティを定義し、値として利用する際は、 var関数の中で接頭辞を除いたカスタムプロパティ名を指定していました。

/*css*/ :root { /* 定義 */ var-fontsize: 20px; } .medium { /* 利用 */ font-size: var(fontsize); /* 20px */ }

CodeGridの記事を書いてから、カスタムプロパティの定義・使用方法が変わり、 その接頭辞が var-* から --* に変更になっています。

/*css*/ :root { --fontsize: 20px; } .medium { font-size: var(--fontsize); } /* 20px */

接頭辞が変わっただけなので、記事で書いた振る舞い自体に変更はありませんでした。

カスタムプロパティの定義

定義したカスタムプロパティはそのスコープでのみ使用できます。

カスタムプロパティが存在しない場合の代替値

各プロパティの値にvar関数を使用した時、そのカスタムプロパティがない場合は、そのプロパティの初期値が適用されます。

ですが、var関数の第二引数には、第一引数に指定したカスタムプロパティがない場合の代替値を指定することができます。

　JavaScriptからカスタムプロパティを操作する

//javascript var root = document.querySelector(':root'); root.style.var.get('--font-size'); root.style.var.set('--font-size', '30px'); root.style.var.forEach(function(propValue, propName) { console.log(propName, propValue); });

とかあるんですが、まだまだできないようです。