You can pass any React app or component as a child of CustomIframe, and it will work just fine! Import CustomIframe from './CustomIframe' We also got access to the iframe document body, then created a portal to render the children passed to iframe in its body instead: import './App.css' We created a ref with the useState() Hook, therefore, once the state is updated, the component will re-render. When a user clicks the Tweet button, the selected content will open in a new Tweet on their Twitter homepage: function App() We’ll use the code snippet above in the following code to generate a Tweet button like the one seen in the following screenshot. We can use the following line of code to add a Twitter Tweet button to a React app: Each of these elements is embedded into the website, which can range in complexity from a single line of code to an entire code section. Nowadays, you rarely see a web app that doesn’t have any content loaded from an external source.įor example, consider how many YouTube videos you find on webpages, Instagram posts you see outside of the app, Facebook comments sections on blogs, and even ads on webpages. Embedding pages from external sourcesįirst, we’ll learn how to embed pages from external sources, which is probably the more common use case of iframes. If the content is too heavy, it can slow down your webpage load time, so you should use iframes carefully. Keep in mind also that iframes use up additional memory. In an iframe, when a piece of content is embedded from an external source, it is completely controlled by the source instead of the website it is embedded in.įor this reason, it’s important to embed content only from a trusted source. In React, developers use iframes to create either a sandboxed component or an application that is isolated from its parent component. Therefore, neither the parent component’s CSS styling nor its JavaScript will have any effect on the iframe. When a resource is rendered in an iframe, it functions independently of the parent component where it is embedded. Let’s get started! Best practices for using iframes in React First, let’s cover some background information on how iframes work and how we should use them. In this tutorial, we’ll explore iframes in React by looking at these two different use cases. Developers also use iframes to isolate certain resources from the same webpage, for example, encapsulating components in iframes by rendering them. Using the tag, you can easily embed external content from other sources directly into your webpage. Short for inline frame, an iframe is essentially a frame within a frame. Some common examples that you may recognize from browsing the web include the share button from Twitter, the like button from Facebook, and the map display from Google Maps.Ī popular way to retrieve this type of data is with an iframe. When building webpages, developers often need to include resources from other webpages. Then, inside index.Chiamaka Umeh Follow A frontend developer with a passion for designing highly-responsive user interfaces for JavaScript-based web and mobile apps using React and React Native. For example, if the page with the iframe is index.jsp, page1.jsp should include this code: Each page that should only be shown in the iframe (page1.jsp, page2.jsp, and page3.jsp) should include JS to detect whether or not it's being displayed in its own window.
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