Tag Archive for: JSON

Formula to JSON

Define formula using variables and transform it to JSON if it’s a valid math expression using Math.js

Asynchronous fetch

Using fetch with asyncronous functions.

This way is even cleaner than using fetch by its own, check this out!

Post JSON data to an URL

The easiest way to do a POST in JavaScript: using fetch.

Get JSON data from an URL

AJAX request using ES6 Promises with fetch and XMLHttpRequest. Notice that the url needs https because we request from https and the server should allow all origins (Access-Control-Allow-Origin: *)

Fetch is simpler and cleaner, it avoid callback hell and having to remember the complex API of XMLHttpRequest.