Use AJAX in magento 2

I have also written a small module for you, this is what is does:

Display a button click me on every page of the site. When clicking the button, a post ajax call is performed, the response is a simple json message

No gimmick in the module, if you need get rather than post, I am sure you'd be finding your way but if not, please let me know

the url is: https://bitbucket.org/magstaging/ajaxcall/src

UPDATE:

In this script below,

<script type="text/x-magento-init">
    {
        "*": {
            "Mbs_AjaxCall/js/clickme": {
                "ajaxUrl": "<?php echo $block->getUrl('mbsajaxdummy'); ?>"
            }
        }
    }
</script>

the json

{
                "ajaxUrl": "<?php echo $block->getUrl('mbsajaxdummy'); ?>"
            }

is the config for the javascript file. Magento parsing picks up this json and makes it available to the clickme.js javascript file

hence, the javascript file:

define([
    "jquery"
], function ($) {
    'use strict';

    return function(config, element) {
        console.log('config', config); // this will show you what is in the console

I created a module that let’s you easily implement custom ajax requests in Magento 2. You might find the module useful or you can use the code to develop your own.

https://github.com/gaiterjones/Magento2_AjaxButton

In Magento 2, your can install a module and assign it a URL route where you can send ajax call.

In this module controller execute() function you will put your php code. at end of this function put echo "somthing" as response.

Here is an example plugin which you can install in magento2. https://github.com/sanaullahAhmad/Magento2_cat_subcat_ajax_select_dropdowns

check this file for rout endpoint

Pulsestorm/HelloWorldMVVM/etc/frontend/routes.xml

it is "hello_mvvm" If you wan to send ajax call to Pulsestorm/HelloWorldMVVM/Controller/Hello/World.php

you should put this in URL field of your ajax call

"http:example.com/index.php/hello_mvvm/hello/world" This will lead to

public function execute(){
    //your code here
    echo "some response here";
}