A declarative, HTML-based language that makes building web apps fun 🔥

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Intro

Marko is HTML reimagined as a language for building dynamic and reactive user interfaces. Almost any valid HTML is valid Marko, and Marko extends HTML for building modern applications more declaratively. Among these extensions are conditionals and lists, state, and components.

Marko supports both single-file components and components across separate files.

Single-file component

The following renders a button and a counter of how many times the button has been pressed:

click-count.marko

class {
  onCreate() {
    this.state = { count: 0 };
  }
  increment() {
    this.state.count++;
  }
}

style {
  .count {
    color: #09c;
    font-size: 3em;
  }
  .press-me {
    padding: 0.5em;
  }
}

<output.count>
  ${state.count}
</output>
<button.press-me on-click('increment')>
  Press me!
</button>

Multi-file component

The same component as above, but split into:

• index.marko template file
• component.js component JS logic file
• style.css component styles file

index.marko

<output.count>
  ${state.count}
</output>
<button.press-me on-click('increment')>
  Press me!
</button>

component.js

export default {
  onCreate() {
    this.state = { count: 0 };
  },
  increment() {
    this.state.count++;
  },
};

style.css

.count {
  color: #09c;
  font-size: 3em;
}
.press-me {
  padding: 0.5em;
}

Concise Syntax

Marko also supports a beautifully concise syntax as an alternative to its HTML syntax:

ul.example-list
  for|color| of=[a, b, c]
    li -- ${color}

<ul class="example-list">
  <for|color| of=[a, b, c]>
    <li>${color}</li>
  </for>
</ul>

Getting Started

1. npm install marko
2. Read the docs

Community & Support

Ask and answer StackOverflow questions with the #marko tag

Come hang out in our Discord chat, ask questions, and discuss project direction

Tweet to @MarkoDevTeam, or with the #markojs hashtag

Contributors

Marko would not be what it is without all those who have contributed ✨

Get Involved!

• Pull requests are welcome!
• Submit GitHub issues for any feature enhancements, bugs, or documentation problems
• Read the Contribution Tips and Guidelines
• Participants in this project agree to abide by its Code of Conduct