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Laterano
Lateranians love sweets, and it is said that a qualified Lateranian knows how to make at least twenty kinds of desserts.
Lateranians have even created the unique dessert “Cactus Tart,” which is loved by the Pope.
Laterano is a front-end framework based on the native support of vanilla-favoured Web Component feature. It allows you to adapt modern MVVM development workflows with the features, abilities, and benefits of Shadow DOM, including native componentized support, styling management, and more.
Note: Laterano was developed for learning purposes originally and is still under active development. We do not recommend using it inside a production environment.
How to use
- Create a vanilla front-end project with Vite. Input
npm init viteinside the terminal, then choose “Vanilla” and “TypeScript” - Install Laterano through npm
- Define your component and use it inside your HTML
- Done!
Here is a sample code for a simple to-do app:
import defineComponent from 'laterano'
import './style.css'
defineComponent({
tag: 'x-todolist',
template: `
<div class="container">
<h1>Todo List</h1>
<input type="text" placeholder="Add a new todo" %connect="todoinput" @keyup="e => this.triggerFunc('keyDownListener', e)" />
<ul class="todo-list">
<li %if="todos.length === 0">
<span class="empty">
No todos yet! Add one above.
</span>
</li>
<li %for="item in todos" %key="item.time" class="todo-item">
<button @click="this.triggerFunc('removeTodo', item.time)">
{{ item.name }}
</button>
</li>
</ul>
</div>
`,
style: `
div.container {
display: flex;
flex-direction: column;
align-items: center;
min-height: 100vh;
background-color: #f0f0f0;
}
div.container input {
width: 20rem;
padding: 0.75rem;
margin-bottom: 1.5rem;
border: 1px solid #ccc;
border-radius: 0.5rem;
font-size: 1rem;
}
div.container input:focus {
border-color: #007bff;
outline: none;
}
div.container ul.todo-list {
list-style-type: none;
padding: 0;
width: 20rem;
border: 1px solid #ccc;
border-radius: 0.5rem;
overflow: hidden;
}
div.container ul.todo-list li {
padding: 10px;
border-bottom: 1px solid #ccc;
background-color: #fff;
}
div.container ul.todo-list li.todo-item {
cursor: pointer;
}
div.container ul.todo-list li:hover {
background-color: #f9f9f9;
}
div.container ul.todo-list li:last-child {
border-bottom: none;
}
div.container ul.todo-list li button {
background: none;
border: none;
width: 100%;
text-align: left;
font-size: 1rem;
cursor: pointer;
}
span.empty {
color: #999;
cursor: default;
}
`,
states: {
todos: [
],
todoinput: ''
},
funcs: {
keyDownListener: function (event: KeyboardEvent) {
if(event.key !== 'Enter') return
if ((this as any).getState('todoinput') === "") return
this.setState("todos", [
...(this as any).getState('todos'),
{
name: (this as any).getState('todoinput'),
time: new Date().getTime()
}
])
this.setState("todoinput", "")
},
removeTodo: function (time: number) {
const todos = (this as any).getState('todos')
let list = structuredClone(todos)
const index = list.findIndex((item: { time: number }) => item.time === time)
if (index !== -1) {
list.splice(index, 1)
this.setState('todos', list)
}
}
}
})
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<link rel="icon" type="image/svg+xml" href="/vite.svg" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Vite + TS</title>
</head>
<body>
<div id="app">
<div>
<x-todolist></x-todolist>
</div>
</div>
<script type="module" src="/src/main.ts"></script>
</body>
</html>