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An API is an application programming interface. It is a set of rules that allow programs to talk to each other. The developer creates the API on the server and allows the client to talk to it. REST determines how the API looks like. It stands for “Representational State Transfer”. It is a set of rules that developers follow when they create their API.

• How To Communicate With Rest Api Js In Java
• Javascript Api Tutorial
• How To Communicate With Rest Api Js Video

I have an HTML page with a button on it. When I click on that button, I need to call a REST Web Service API. I tried searching online everywhere. No clue whatsoever. Can someone give me a lead/Headstart on this? Very much appreciated.

7 Answers

I'm surprised nobody has mentioned the new Fetch API, supported by all browsers except IE11 at the time of writing. It simplifies the XMLHttpRequest syntax you see in many of the other examples.

The API includes a lot more, but start with the fetch() method. It takes two arguments:

1. A URL or an object representing the request.
2. Optional init object containing the method, headers, body etc.

Simple GET:

Recreating the previous top answer, a POST:

How To Communicate With Rest Api Js In Java

Your Javascript:

Your Button action::

For more info go through the following link (Updated 2017/01/11)

Here is another Javascript REST API Call with authentication using json:

I think add if (this.readyState 4 && this.status 200) to wait is better:

Before we try to put anything on the front end of the website, let's open a connection the API. We'll do so using XMLHttpRequest objects, which is a way to open files and make an HTTP request.

Javascript Api Tutorial

We'll create a request variable and assign a new XMLHttpRequest object to it. Then we'll open a new connection with the open() method - in the arguments we'll specify the type of request as GET as well as the URL of the API endpoint. The request completes and we can access the data inside the onload function. When we're done, we'll send the request.
// Create a request variable and assign a new XMLHttpRequest object to it. var request = new XMLHttpRequest()

Usual way is to go with PHP and ajax. But for your requirement, below will work fine.

Not the answer you're looking for? Browse other questions tagged javascripthtmlrestweb-services or ask your own question.

How To Communicate With Rest Api Js Video

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  Developers can interact remotely with a WordPress site from a client-side or external application by using the WordPress REST API. Using JSON objects, this API allows you to create and send content to a site, request information from a site, update existing content, and even create single page applications on top of WordPress. This course takes a detailed look at putting the WordPress REST API to use, demonstrating the use of routes, endpoints, arguments, requests, responses, and more. Technologies covered include RESTful APIs, JSON, HTML, CSS, JavaScript, PHP, and AJAX.

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  - [Teacher] The purpose of the WordPress REST API is that we'll be able to send a request to the database through the API and then get the database content back in a compact easy to read format, all by sending a URL along with a verb. The REST API and all its endpoints sit at your WordPress site under a common URL. Yoursite.com/wp-json. From here we can request any of the content on the site. So for example, if I want the ten most recent posts from my site which sits on mor10.com, I can simply go to my browser, which passes a GET request and then say GET mor10.com/wp-json/wp/v2/posts. What you see here are two things. First, the response was pretty much instantaneous. And second this easy to read data is not so easy to read, at least not for a human being using a browser. And that's because the browser is not setup to read json out of the box. The browser expects us to take that information and then process it through some sort of programming language to display it in a human readable…

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Course Contents

• IntroductionIntroduction
• 1. An Intro to the WordPress REST API1. An Intro to the WordPress REST API
• 2. Explore the WordPress REST API2. Explore the WordPress REST API
• 3. Modify the Response3. Modify the Response
• 4. Using the API in WordPress: Example4. Using the API in WordPress: Example
• 5. Using the API outside of WordPress: Example5. Using the API outside of WordPress: Example