How do we use it?
To effectively leverage LitHTML, developers follow these steps:
Step 1: Define Templates
Begin by creating HTML templates using JavaScript template literals. Integrate dynamic expressions seamlessly using ${…} syntax.
const myTemplate = (name) => html`
<p>Hello, ${name}!</p>
`;
Step 2: Use Template Functions
Make use of LitHTML’s template functions like html and svg. Wrap them around template literals for proper parsing of dynamic content.
import { html } from 'lit-html';
const myTemplate = (name) => html`
<p>Hello, ${name}!</p>
`;
Step 3: Render Templates
Utilize the render function provided by LitHTML to render templates to the DOM. Specify the target element where the template will be rendered.
import { render } from 'lit-html';
const updateUI = (name) => {
render(myTemplate(name), document.getElementById('app'));
};
Step 4: Update Templates Dynamically
Easily update templates in response to user actions or changes in application state. This efficiently propagates changes to the DOM, ensuring a dynamic user experience.
document.getElementById('updateButton').addEventListener('click', () => {
const newName = document.getElementById('nameInput').value;
updateUI(newName);
});
These steps empower developers to create dynamic and interactive web experiences with ease using LitHTML.
Approach
This code demonstrates how to create a dynamic greeting message using LitHTML, a lightweight HTML template library for building dynamic web components and applications. The code consists of an input field where users can enter their name and a button labeled “Update Greeting”. Upon clicking the button, the greeting message updates dynamically to greet the user with the entered name.
Create a file named index.html inside your project directory and download Live Server extension. Copy the following code into index.html, save it, and click on “go live”. You will be able to see the output on the browser.
Example: This example shows the implementation of the above-explained appraoch.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,
initial-scale=1.0">
<title>LitHTML Example</title>
<script type="module"
src="https://cdn.jsdelivr.net/npm/lit-html?module"></script>
</head>
<body>
<div id="app"></div>
<!-- Input field and button -->
<div>
<input type="text" id="nameInput" placeholder="Enter your name">
<button id="updateButton">Update Greeting</button>
</div>
<script type="module">
import { html, render } from
'https://cdn.jsdelivr.net/npm/lit-html?module';
// Define a template
const template = (name) => html`
<p>Hello, ${name}!</p>
`;
// Render the template to the #app element
const updateUI = (name) => {
render(template(name), document.getElementById('app'));
};
// Function to handle updating greeting message
const handleUpdate = () => {
const newName = document.
getElementById('nameInput').value;
updateUI(newName);
};
// Initial rendering
updateUI('World');
// Add event listener to update
// greeting message on button click
document.getElementById('updateButton')
.addEventListener('click', handleUpdate);
</script>
</body>
</html>
Output:
Dynamic Greeting with LitHTML
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