Add Sharepoint Online list item using pure JavaScript

Question

I am trying to do the following:

I have a Wordpress site where I have created a form. On submit event I want to send the data to my Sharepoint Online list. The problem I am facing is the fact that the solution needs to be build entirely with JavaScript and/or jQuery.

I have seen multiple examples of people doing it but all of them somehow are having client context or _spPageContextInfo available. That is not the case with me.

My question is: Is there a way just send the data to the list using simple POST request?

Answer 1

OutSide of SharePoint Online Site, it's necessary to get the access token for authentication purpose.

A solution is to register a SharePoint App and get the access token with this request:

Then use the access token in the request to handle data:

Here is a detailed blog for reference:

Accessing SharePoint Data using Postman (SharePoint REST API)

Postman is a test purpose, you can convert the request above into Jquery ajax for coding.