Guide: Get JSON with the jQuery getJSON Method

Application Programming Interfaces - are tools that computers use to communicate with one another.

Most web APIs transfer data in a format called JSON. JSON stands for JavaScript Object Notation. JSON is nothing more than object properties and their current values, sandwiched between a { and a }.

These properties and their values are often referred to as “key-value pairs”.

Here is a sample of what it looks like.

$.getJSON("/json/cats.json", function(json) {



$.getjson() Load JSON-encoded data from the server using a GET HTTP request.

A common use of JSON is to exchange data to/from a web server.
When sending data to a web server, the data has to be a string.
Convert a JavaScript object into a string with JSON.stringify().

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in url parameter, how can we know that link will send back json data. For example if I want to create another JSON object like books.json just for test, how can I create an url like /json/books.json to send back the this json data?