The other situation when iframes saved my life was when I had to build a WYSIWYG editor for a customer. It supposed to be rendered in black on a white background."> The content you see here will never be affected by the CSS of its parent container. On a particular page, I needed to list them to let him preview and choose one.īut, to prevent the CSS of the current website from affecting the style of these templates, I figured out that using an iframe with the srcdoc attribute was the cleanest solution. In an application, the user could create emails and save them as templates. To illustrate how this isolation from the JavaScript and CSS is handy, let’s take a look at these two situations: The iframe can still behave in annoying or malicious ways: triggering a popup or auto-playing videos for instance. Nonetheless, as you will see in this guide, the separation is not so perfect. That is one of the valid purposes to use an iframe: to provide a measure of separation between your application and the iframe content. Thus, it will be isolated from the JavaScript and CSS of the parent. What you must keep in mind when thinking about an iframe is that it lets you embed an independent HTML document with its browsing context. Here is another example in which we display a button to tweet your web page on Twitter: You may have crossed paths with it when you had to include a third-party widget (like the famous Facebook like button), a YouTube video, or an advertising section on your website.įor instance, the code below will display a 500px square with the google homepage within: What is an iframe, and when do you use it?ĭevelopers mainly use the iframe tag to embed another HTML document within the current one. Finally, we’ll talk about how you can secure your iframe to avoid potential vulnerabilities. We’ll go through most of the features the iframe element provides and talk about how you use them, as well as how iframe can be useful for overcoming some tricky situations. To help you form your own opinion and sharpen your developer skills, we will cover all the essentials you should know about this controversial tag. They have many legitimate uses cases.īesides, it’s not that hard to secure them, so you won’t have to worry about your user’s computer becoming infected. I believe that their bad reputation should not prevent you from relying on them. The iframe element (short for inline frame) is probably among the oldest HTML tags and was introduced in 1997 with HTML 4.01 by Microsoft Internet Explorer.Įven though all modern browsers support them, many developers write endless articles advising against using them. Nada also dabbles in digital marketing, dance, and Chinese. She specializes in Vue.js and loves sharing anything and everything that could help her fellow frontend web developers. If you are using an older version of React or require support for IE8-10 then you should checkout react-iframe-resizer-super, which is based on iframe-resizer v3.Nada Rifki Follow Nada is a JavaScript developer who likes to play with UI components to create interfaces with great UX. This project uses React Hooks internally, so requires React 16.8 or later. Methods ( Except close() and removeListeners()) These methods are exported directly via forwardRef, rather than being attached to the iframe.Instead you should just remove the componet via JSX and it will internally call these methods for you to remove attached handlers. The full iframe-resizer API is supported by the compontent, except for the methods and events used to remove an iframe from the page. Iframe-resizer is the result of many 100s of hours of work, if you would like to join others in showing support for the development of this project, then please feel free to buy me a coffee. Works with ViewerJS to support PDF and ODF documents.Exposes parent position and viewport size to the iFrame.Provides custom sizing and scrolling methods.Fixes in page links in iFrame and supports links between the iFrame and parent page.Simplified messaging between iFrame and host page via postMessage.Detects events that can cause the page to resize (Window Resize, CSS Animation and Transition, Orientation Change and Mouse events).Detects changes to the DOM that can cause the page to resize using MutationObserver.Provides a range of page size calculation methods to support complex CSS layouts.Domain authentication for cross domain iFrames.Works with multiple and nested iFrames.Height and width resizing of the iFrame to content size. It provides a range of features to address the most common issues with using iFrames, these include: This library is the official React interface for iframe-resizer, which enables the automatic resizing of the height and width of both same and cross domain iFrames to fit their contained content.
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