Guide: How to Design RSS Reader App using JavaScript
RSS is a standardized format used by online publishers to convert syndicate their content to other websites and services. A RSS document, also known as a feed, is a XML document with the content that a publisher wants to distribute.
RSS feeds are a way for online news websites and blogs to keep track of the latest content from their readers. They can also be found on non-text based websites such as YouTube, where you can use the feed from a YouTube channel up to date with the latest videos.
Create a simple RSS reader program in JavaScript. In this tutorial, we will see how to create a simple RSS reader program that accesses feeds and displays their content.
Structure of an RSS feed
An RSS feed has a root element called “channel”, similar to the “article” tag in HTML documents. Within the “channel” tag contains a “item” element, similar to the “section” tag in HTML, that contains many sub-elements with the distributed content of the website. ..
The title of the website, The URL of the website, And the description of the website
An RSS feed is a collection of articles, blog posts, or other content that can be subscribed to and read when the user wants. The optional elements in an RSS feed provide additional information, such as images or copyrights to the distributed content. Cyber.harvard.edu has a specification for teaching RSS 2.0, which is an optional extension to RSS that allows for more complex features such as subscribing to feeds on different topics and tracking changes over time. ..
RSS Feed from Website
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Get the feed
http://www.hongkiat.com/rss/3-ways-to-use-rss-in-web-development/ We need to get the RSS feed from our RSS reader application in order to view the latest news. For example, on a website, the URL can be found in the tag with type application / rss + xmlFor example, you can find the following RSS feed link on Hongkiat.com. ..
var feedUrl = “https://www.example.com/feed/" ; jQuery(feedUrl);
Fetching the website’s URL and checking if it exists will return a text string that can be used to create an HTML page. If the website does not exist, then an error will be thrown.
The to pick up () method is a global method that fetches a resource asynchronously. It takes the URL of the source as an argument (the URL of the website in our code). It returns a promise object, so when the method fetches the website successfully (i.e. the promise is fulfilled), the first function in the then () statement handles the retrieved answer (see code above).
The retrieved answer is then read completely in a text string using the text() method. This text represents the HTML text from our retrieved website. Like fetch(), text() too returns a Promise object, so if it successfully creates a response text from the response flow, then () will handle that response text (htmlText in the above code). ..
DOMParser parses an XML / HTML text string in a DOM document. His method, parseFromString (), takes two arguments: the text to be parsed and the content type.
We use the querySelector () method to find the href value of the relevant one tag. This value is then used to get the URL of the feed. ..
Parse and display the feed
Once we have the feed URL of the website, we need to do that get and read the RSS document found at that URL.
Fetching a feed from a URL and returning its text and XML content.
We pull up the website and parse it into a DOM document using the content type ‘text / xml’. Then, we use the fetch() method to get the XML feed and parse it into a DOM document.
We use the querySelectorAll method to select all elements in the document. We walk through each of the selected elements to get information about them. ..
tags can be used to group elements together, and they can also be used to identify specific elements within a document. Tags can be found in the headings, the body of a document, and in the tags section of a web page.
How to Design RSS Reader App using JavaScript: benefits
Faq
Final note
How to Design an RSS Reader App using JavaScript
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