Welcome to the Comprehensive Guide to es-dev-server
In this guide, we delve into the powerful capabilities of es-dev-server, a development server tailored for modern web development. We will explore various APIs, along with practical code snippets and an example application to enhance your understanding.
Introduction to es-dev-server
es-dev-server is a versatile development server that provides an array of features to simplify modern web development. It supports ES modules, efficiently handles file serving and facilitates a seamless development experience. Let’s explore some of its notable APIs and their applications.
Key APIs and Usage Examples
Starting the Server
To start the es-dev-server, use the following command:
npx es-dev-server --app-index index.html --node-resolve --watch
Using Middleware
You can integrate middleware for additional capabilities such as logging and transforming requests:
const { createServer } = require('es-dev-server');
const server = createServer({
middlewares: [
(context, next) => {
console.log(context.url);
return next();
},
],
});
server.start();
Custom Rollup Configuration
You can customize the Rollup configuration to optimize bundling:
const { createServer } = require('es-dev-server');
createServer({
rollup: {
plugins: [
// add your custom rollup plugins here
],
},
}).start();
Transforming Files
Custom file transformation can be achieved through the fileHooks option:
const { createServer } = require('es-dev-server');
createServer({
fileHooks: {
transform(context, file, body) {
if (context.path.endsWith('.html')) {
return body.replace('Old Title ', 'New Title ');
}
return body;
},
},
}).start();
Using Proxy
Proxy functionality can route specific requests to a different backend:
const { createServer } = require('es-dev-server');
createServer({
proxy: {
'/api': 'http://localhost:3000',
},
}).start();
Example App Using es-dev-server
Here’s a basic example app demonstrating the integration of various es-dev-server APIs:
// index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>es-dev-server Example</title>
</head>
<body>
<h1>Hello World</h1>
<script type="module" src="main.js"></script>
</body>
</html>
// main.js
const greeting = 'Hello World';
console.log(greeting);
// server.js
const { createServer } = require('es-dev-server');
createServer({
appIndex: 'index.html',
nodeResolve: true,
watch: true,
middlewares: [
(context, next) => {
console.log('Request URL:', context.url);
return next();
},
],
}).start();
By following the steps above, you can leverage the powerful features of es-dev-server to streamline your development workflow and build modern web applications with ease.
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