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

Docs ∙ Try Online ∙ Contribute ∙ Get Support

Intro

Marko is HTML re-imagined as a language for building dynamic and reactive user interfaces. Just about any valid HTML is valid Marko, but Marko extends the HTML language to allow building modern applications in a declarative way.

Among these extensions are conditionals, lists, state, and components. Marko supports both single-file components and components broken into separate files.

Single file component

The following single-file component renders a button and a counter with the number of times the button has been clicked.

click-count.marko

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

style {
    .count {
        color: #09c;
        font-size: 3em;
    }
    .example-button {
        font-size: 1em;
        padding: 0.5em;
    }
}

<div.count>
    ${state.count}
</div>
<button.example-button on-click('increment')>
    Click me!
</button>

Multi-file component

The same component as above split into an index.marko template file, component.js containing your component logic, and style.css containing your component style:

index.marko

<div.count>
    ${state.count}
</div>
<button.example-button on-click('increment')>
    Click me!
</button>

component.js

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

style.css

.count {
  color: #09c;
  font-size: 3em;
}
.example-button {
  font-size: 1em;
  padding: 0.5em;
}

Concise Syntax

Marko also supports a beautifully concise syntax as an alternative to its HTML syntax. Find out more about the concise syntax here.

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

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

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 room, 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!
• Read CONTRIBUTING.md and check out our bite-sized and help-wanted issues
• Submit github issues for any feature enhancements, bugs or documentation problems
• By participating in this project you agree to abide by its Code of Conduct.

License

MIT