JavaScript Request Cookbook

In this repository I will try to collect the most common use cases of sending request using JavaScript.

I will give examples for the following approaches:

• XMLHttpRequest API
• Fetch API
• jQuery Ajax
• Axios

I will use JSONPlaceholder service for requests testing and CodePen for code examples (open Console Panel)

Table of Contents

• Requirements
• Installation
• Basics
  • HTTP Request methods
    • GET method

Basics

HTTP Request methods

GET method

XMLHttpRequest API

[example]

let request = new XMLHttpRequest();

request.addEventListener("load", function () {
  console.log(
    JSON.parse(this.responseText)
  );
});

request.open("GET", "https://jsonplaceholder.typicode.com/todos/1");
request.send();

Fetch API

[example]

fetch('https://jsonplaceholder.typicode.com/todos/1')
  .then(response => response.json())
  .then(json => console.log(json))

jQuery Ajax

[example]

$.get('https://jsonplaceholder.typicode.com/todos/1', function (response) {
  console.log(response);
});

Axios

[example]

axios.get('https://jsonplaceholder.typicode.com/todos/1')
  .then(function (response) {
    console.log(response.data);
  });

Response

Object {
  completed: false,
  id: 1,
  title: "delectus aut autem",
  userId: 1
}