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Learn Azure-functions - 10 Code Examples & CST Typing Practice Test

Azure Functions is Microsoft’s serverless compute service, allowing developers to run event-driven code without managing infrastructure. It integrates with the Azure ecosystem and supports multiple programming languages, focusing on scalability, automation, and cloud-native development.

View all 10 Azure-functions code examples →

Simple Azure Function (JavaScript)Azure Function with Query Parameters Azure Function with JSON Response Azure Function POST Handler Azure Function with Environment Variables Azure Function Redirect Azure Function Error Handling Azure Function Delayed Response Azure Function Fetch External API Azure Function with Custom Headers

Learn AZURE-FUNCTIONS with Real Code Examples

Updated Nov 25, 2025

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Code Sample Descriptions

1

Simple Azure Function (JavaScript)

# azure/demo/index.js
module.exports = async function (context, req) {
    context.res = {
        status: 200,
        body: 'Hello, Azure!'
    };
};

A simple Azure Function responding with 'Hello, Azure!' to HTTP requests.

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2

Azure Function with Query Parameters

# azure/demo/query.js
module.exports = async function (context, req) {
    const name = req.query.name || 'Guest';
    context.res = {
        status: 200,
        body: `Hello, ${name}!`
    };
};

Reads query parameters and responds with a personalized message.

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3

Azure Function with JSON Response

# azure/demo/json.js
module.exports = async function (context, req) {
    context.res = {
        status: 200,
        body: { message: 'Hello, JSON!' }
    };
};

Returns a JSON object in the response body.

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4

Azure Function POST Handler

# azure/demo/post.js
module.exports = async function (context, req) {
    const data = req.body;
    context.res = {
        status: 200,
        body: `Received: ${data.input}`
    };
};

Handles POST requests and parses JSON body.

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5

Azure Function with Environment Variables

# azure/demo/env.js
module.exports = async function (context, req) {
    const secret = process.env.MY_SECRET || 'No Secret';
    context.res = {
        status: 200,
        body: `Secret is: ${secret}`
    };
};

Uses environment variables in the function.

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6

Azure Function Redirect

# azure/demo/redirect.js
module.exports = async function (context, req) {
    context.res = {
        status: 302,
        headers: { 'Location': 'https://azure.microsoft.com/' },
        body: ''
    };
};

Responds with a redirect to another URL.

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7

Azure Function Error Handling

# azure/demo/error.js
module.exports = async function (context, req) {
    try {
        throw new Error('Something went wrong');
    } catch(err) {
        context.res = {
        status: 500,
        body: err.message
        };
    }
};

Demonstrates returning an error response.

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8

Azure Function Delayed Response

# azure/demo/delay.js
module.exports = async function (context, req) {
    await new Promise(resolve => setTimeout(resolve, 1000));
    context.res = {
        status: 200,
        body: 'Delayed Hello!'
    };
};

Returns a response after a simulated delay.

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9

Azure Function Fetch External API

# azure/demo/fetch.js
const fetch = require('node-fetch');
module.exports = async function (context, req) {
    const response = await fetch('https://api.github.com');
    const data = await response.json();
    context.res = {
        status: 200,
        body: data
    };
};

Fetches data from an external API and returns it.

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10

Azure Function with Custom Headers

# azure/demo/headers.js
module.exports = async function (context, req) {
    context.res = {
        status: 200,
        headers: { 'X-Custom-Header': 'AzureFunction' },
        body: 'Hello with headers'
    };
};

Returns custom HTTP headers in the response.

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Frequently Asked Questions about Azure-functions

What is Azure-functions?

Azure Functions is Microsoft’s serverless compute service, allowing developers to run event-driven code without managing infrastructure. It integrates with the Azure ecosystem and supports multiple programming languages, focusing on scalability, automation, and cloud-native development.

What are the primary use cases for Azure-functions?

Event-driven APIs and microservices. Background processing and job automation. Webhook and HTTP request handling. Real-time data processing and streaming. Integration with Azure services for enterprise workflows

What are the strengths of Azure-functions?

Seamless integration with Azure ecosystem. Highly scalable and managed infrastructure. Supports multiple languages and runtime versions. Flexible triggers and bindings simplify coding. Built-in monitoring via Azure Application Insights

What are the limitations of Azure-functions?

Vendor lock-in to Azure platform. Cold start latency in some hosting plans. Complexity increases with advanced bindings or triggers. Requires familiarity with Azure portal or CLI. Execution time and memory limits depend on plan

How can I practice Azure-functions typing speed?

CodeSpeedTest offers 10+ real Azure-functions code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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