Postman enables you to create and send API requests. Send a request to an endpoint, retrieve data from a data source, or test an API’s functionality.
https://www.postman.com/downloads/
A good Web/HTML IDE must have simultaneous code and view split screens
The free ones that in 2021 do are:
1) Microsoft Expression Web 4
2) WDL website Builder 4
The next best choice are those that will render the output by changing tab SeaMonkey:
And there is Libre office writer 6.x
in which you can switch the view
The weakest is Notepad++ that launches to browser
===========================
https://insights.stackoverflow.com/survey/2018
2017
Web technology for developers
https://developer.mozilla.org/en-US/docs/Web
HTML
https://www.w3schools.com/tags/att_input_type.asp
PHP – AJAX and MySQL
https://www.w3schools.com/php/php_ajax_database.asp
