Serverless computing is a cloud computing execution model where the cloud provider manages the infrastructure and automatically allocates resources based on demand.
Key characteristics:
1. **No Server Management:**
- Zero infrastructure maintenance
- Automatic scaling
- Pay-per-use billing
2. **Event-Driven:**
- Function triggers
- Automatic execution
- Stateless operations
Example AWS Lambda function:
<div class="code-block" data-lang="javascript"><div class="highlight"><pre><span></span><span class="nx">exports</span><span class="p">.</span><span class="nx">handler</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">async</span><span class="w"> </span><span class="p">(</span><span class="nx">event</span><span class="p">)</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="p">{</span>
try {
const result = await processEvent(event);
return {
statusCode: 200,
body: JSON.stringify(result)
};
} catch (error) {
return {
statusCode: 500,
body: JSON.stringify({ error: error.message })
};
}
};