They're useful for displaying third-party content, embedding multimedia, and creating reusable widgets. Iframes are an important tool in web development, allowing you to embed content from other web pages within your own. In this example, we've allowed the iframe to execute JavaScript and submit forms, but other restrictions will still apply. Here's an example of an iframe with sandbox restrictions: allow-top-navigation: Allows the iframe content to navigate to the containing page.allow-scripts: Allows JavaScript execution.allow-same-origin: Allows the iframe content to be treated as being from the same origin as the containing page.allow-popups: Allows pop-ups, such as new windows or tabs.The sandbox attribute has several values that control the restrictions applied to the iframe: This is useful when embedding content from third-party websites that you may not trust fully. The sandbox attribute can be used to apply extra security restrictions to the content of an iframe. If a user's browser does not support iframes, they will see the message and link provided between the tags.
You can do this by adding the message between the opening and closing tags, like so: While iframes are widely supported by modern web browsers, it's still a good idea to provide a fallback message for browsers that do not support them. Here's an example of an iframe with a 5-pixel solid red border:
You can remove this border or change its appearance using the style attribute. Adding a border to an iframeīy default, iframes have a thin border around them. The iframe has a width of 800 pixels and a height of 600 pixels. In this example, we're embedding the web page at within our current web page. To create an iframe, use the element with the src attribute specifying the URL of the web page you want to embed. Now that we have a basic understanding of what iframes are and their use cases, let's see how to work with them using code examples. For example, a calculator, a calendar, or a newsletter signup form can be created as a separate web page and then embedded in multiple locations using an iframe.