Riot.js is a lightweight, elegant component-based UI library providing virtual DOM rendering with near-zero boilerplate.
Component Definition (my-component.riot)
<user-card>
<div class="card">
<h3>{ state.name }</h3>
<p>Role: { props.role }</p>
<button onclick="{ handleIncrement }">Likes: { state.likes }</button>
</div>
<script>
export default {
onBeforeMount(props, state) {
this.state = {
name: props.initialName || 'Anonymous',
likes: 0
};
},
handleIncrement() {
this.update({
likes: this.state.likes + 1
});
}
}
</script>
</user-card>
Lifecycle Events
| Method | Trigger Stage |
|---|---|
onBeforeMount(props, state) |
Before component is mounted to the DOM |
onMounted(props, state) |
After component is attached to the DOM |
onBeforeUpdate(props, state) |
Before component state update re-renders |
onUpdated(props, state) |
After component DOM updates |
onBeforeUnmount(props, state) |
Right before component is destroyed |
onUnmounted(props, state) |
After component has been removed from DOM |
Loops & Conditionals
<!-- Conditionals -->
<p if="{ state.isLoggedIn }">Welcome back!</p>
<button if="{ !state.isLoggedIn }">Log In</button>
<!-- Loops -->
<ul>
<li each="{ item in state.items }">
{ item.title }
</li>
</ul>