Tag Archive for: JSON

Formula to JSON

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

Asynchronous fetch

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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

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

Get JSON data from an URL

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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.