JQuery to parse RSS feed in SharePoint

If you want to show the list RSS Feed in SharePoint page, we can use the code below to achieve it.

<script src="https://code.jquery.com/jquery-1.12.4.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {  
    $.ajax({
        url: _spPageContextInfo.webAbsoluteUrl + "/_layouts/15/listfeed.aspx?List=f3d7161e-2f6d-4c6e-8d7d-1721e8b70ef0&View=5d658d21-4804-47d9-b993-0752aeb8feb5",
        type: "GET",
        headers: {
            "Accept": "application/rss+xml",
        },
        dataType:"xml",
        success: function (data){
            $(data).find("item").each(function () {          
                var html="<p><a href='"+$(this).find("link").text()+"'>"+$(this).find("title").text()+"</a><br/>";
                html+=""+$(this).find("description").text()+"</p>";
                $("#showListRSSFeed").append(html);
            });
        },
        error: function (data) {
            //alert("Error");
        }
    }); 
})
</script>
<div id="showListRSSFeed"/>

If you want to access SharePoint list RSS Feed in external site, the code will not works, SharePoint online don't allow you anonymous access list RSS Feed.

I don't think that you do what you want to do.

Here, you retrieve the output of an RSS reader. This Rss Reader reads for you files/stream that it can read : public rss feed.

Yours is private, and this tool have no access to it.

If you want to read rss, put this snippet on your page instead :

$(document).ready(function() {
//feed to parse
var feed = "https://test.sharepoint.com/sites/DeveloperSite/_layouts/15/listfeed.aspx?List=f3d7161e-2f6d-4c6e-8d7d-1721e8b70ef0&View=5d658d21-4804-47d9-b993-0752aeb8feb5";

$.ajax(feed, {
    accepts:{
        xml:"application/rss+xml"
    },
    dataType:"xml",
    success:function(data) {
        //Credit: http://stackoverflow.com/questions/10943544/how-to-parse-an-rss-feed-using-javascript

        $(data).find("item").each(function () { // or "item" or whatever suits your feed
            var el = $(this);
            console.log("------------------------");
            console.log("title      : " + el.find("title").text());
            console.log("link       : " + el.find("link").text());
            console.log("description: " + el.find("description").text());
        });


    }   
});

});

Source : https://www.raymondcamden.com/2015/12/08/parsing-rss-feeds-in-javascript-options

you can go with more modern javascript (and less jquery) as well ;) => source : https://www.hongkiat.com/blog/rss-reader-in-javascript/