request Archives | JS FAQ - JavaScript Guides Online

How to parse request body in Node.js without a library

Handling JSON payloads requires well-defined data structures. Validation after parsing ensures data adheres to expected formats, enhancing application reliability. Key considerations include checking types and fields. Additionally, handling plain text data involves straightforward accumulation and processing. Mastery of various content types is essential for scalable applications.

E2E Testing: Cypress

How to test API calls in Cypress

E2E Testing: Cypressapi, cypress, mock, request

Best practices for asserting API responses in Cypress enhance test clarity and reliability. This includes using meaningful assertions, custom commands for user validation, and leveraging `cy.request` for efficient API testing. Libraries like Lodash can simplify assertions on nested structures. Effective documentation ensures maintainability of tests.

Fetch API and AJAX

How to set request headers using fetch in JavaScript

Fetch API and AJAXfetch, headers, js fetch, request

Handling fetch API responses requires careful attention to status codes, authentication headers, and CORS policies. Common pitfalls include neglecting error handling for network issues and improper Content-Type settings with FormData. Ensuring secure connections with HTTPS is crucial for robust network requests and avoiding mixed content errors.

Node.js Networking

How to read HTTP headers in Node.js

Node.js Networkingheaders, http, node.js, request

Node.js http module provides direct access to incoming HTTP request headers via req.headers, a JavaScript object. Headers can be read, like User-Agent, or set in responses using res.setHeader. Handling headers is essential for APIs, authentication, caching, and managing proxies or load balancers.

Libraries: Axios

How to pass URL parameters in Axios

Libraries: Axiosaxios, params, query, request

Axios simplifies complex query string serialization, supporting nested objects and arrays using the qs library by default. It automatically converts structured params into proper query strings and allows custom paramsSerializer functions for tailored serialization formats.

Node.js Networking

How to send an HTTP request in Node.js

Node.js Networkingclient, http, node.js, request

Third-party libraries like axios, node-fetch, superagent, and got simplify HTTP requests in Node.js with promise-based APIs. They handle redirects, error management, and content negotiation, allowing developers to focus on application logic. Features include request cancellation, JSON parsing, and built-in support for cookies and HTTP/2.

Libraries: Axios

How to send a POST request using Axios

Libraries: Axiosaxios, body, post, request

Axios response object structure: data, status, headers. Detailed Axios error handling: the error object, error.response for server status codes, and error.request for network failures. Code examples using async/await with try/catch for robust JavaScript applications.

Libraries: Axios

How to send a GET request with Axios in JavaScript

Libraries: Axiosaxios, get, http, request

Graceful Axios error handling using the error object (`error.response`, `error.request`). Manage HTTP status codes with `validateStatus`, set request timeouts, and cancel in-flight requests with an `AbortController` signal.