rad 0.7.1

A zero-dependency frontend framework for writing web apps in plain Dart. Inspired from Flutter.

Rad

Rad is a frontend framework for creating fast and interactive websites using Dart. It's inspired from Flutter and shares same programming paradigm. It has all the best bits of Flutter(StatefulWidgets, Builders) and allows you to use web technologies(HTML and CSS) in your app.

Quick links

• Getting started
• Package @ pub.dev
• API reference @ pub.dev
• Repository @ github.com

Example

Let's take a look at an example written using Rad:

class HomePage extends StatelessWidget
{
  @override
  build(context) {
    return Text("hello world");
  }
}

How about that? if you're familiar with Flutter it don't even need an explanation. But there are some differences that should be discussed before you begin using Rad,

Differences

1. First off, we don't use a rendering engine to render a widget or anything like that. Widgets are mapped to HTML tags and composed together they way you describe them. This means every widget has a corresponding HTML tag in DOM, and your application has complete access to document(DOM).

2. Rad's doesn't rebuild widgets multiple times a second, which means for animations you've to turn to CSS.

3. For designing a interface, you've to use HTML. And guess what? there are widgets for that.

   Let's take this HTML snippet:

   <span class="heading big">
     <strong>
       hellow
     </strong>
   </span>
   

   Here's how its equivalent will be written using widgets:

   Span(
     classAttribute: "heading big",
     children: [
       Strong(innerText: "hellow"),
     ],
   );
   

   Talking more about UI, there are no layout/style specific widgets like you've Container and Stack widgets in Flutter. Just think about it for a sec? we don't really need them as most of things can be done using HTML tags and CSS.

   Just for sake of example, let's say you want a Stack widget,

   1. Create a Stack entry:

      Widget StackEntry(Widget widget)
      {
        return Division( 
            style: "position:absolute;top:0;left:0;",
            children: [widget],
          );
      
        // Division = HTML's div
      }
      

   2. Create a Stack container

      Widget Stack({required List<Widget> children})
      {
        return Division(
            style: "position:relative;",
            children: entries,
          );
      }
      

   3. Well done! here's our newly created Stack widget

      Stack(
        children: [
          StackEntry(Text("hellow 1")),
          StackEntry(Text("hellow 2")),
        ]
      )
      

      This was just an example, you don't really need these type of widgets when you can use a CSS framework of your choice.

Widgets Index

Below is the list of available widgets in this framework.

Some widgets are named after Flutter widgets because they either works exactly same or can be used to acheive same things but in a differnet way(more or less). All those widgets are marked according to their similarity level.

Markings:

• exact: Exact syntax, similar semantics.
• same: Exact syntax with few exceptions, similar semantics.
• different: Different syntax, different semantics.
• experimental: --

Please note that these markings are based solely on my understanding of Flutter widgets/src. If you happen to find any big differences, do let me know.

Main

• RadApp

Navigator/Routing

• Navigator [different]
• Route [different]

Abstract

• InheritedWidget [exact]
• StatelessWidget [exact]
• StatefulWidget [exact]

Builders

• FutureBuilder [exact]
• StreamBuilder [exact]
• ValueListenableBuilder [exact]
• ListView.builder [same]

Elements

• Text [different]
• RawMarkUp
• ListView [same]
• GestureDetector [experimental]

HTML

• Header

• Footer

• Navigation

• Span

• Small

• Strong

• Idiomatic

• SubScript

• SuperScript

• Division

• Anchor

• Blockquote

• HorizontalRule

• Label

• Legend

• IFrame

• BreakLine

• Image

• Canvas

• Paragraph

• Progress

• UnOrderedList

• ListItem

• Button

• Select

• Option

• Form

• FieldSet

• InputText

• InputCheckBox

• InputRadio

• InputFile

• InputSubmit

• TextArea

• Heading(1-6)

Why Dart?

I actually tried writing this in TypeScript before. While we can do awesome things with types in TS, it also inherits craziness from JS (has to bind 'this', use arrow fun, and more things like that). Later I decided to give Dart a try and I quickly realized that Dart is a very underrated language. You don't have to trust me on that. I had wrote a lot of Dart code with Flutter, but the fact that I choosed TS at first place really shows how underrated Dart actually is. I deeply believe Dart is a amazing language, and I am thankful to all the people who helped create Dart and/or contributing to it, one way or the other.