Quick Reference
An iframe is used to create a rectangular region, including scrollbars and borders, in one web page to display another web page. These are its attributes.
| Attribute | Value | Description |
|---|---|---|
| allow | Specifies a feature policy for the <iframe> | |
| allowfullscreen | true false | Set to true if the <iframe> can activate fullscreen mode by calling the requestFullscreen() method |
| allowpaymentrequest | true false | Set to true if a cross-origin <iframe> should be allowed to invoke the Payment Request API |
| height | pixels | Specifies the height of an <iframe> (default height is 150 pixels) |
| loading | eager lazy | Specifies whether a browser should load an iframe immediately or to defer loading of iframes until some conditions are met |
| name | text | Specifies the name of an <iframe> |
| referrerpolicy | no-referrer no-referrer-when-downgrade origin origin-when-cross-origin same-origin strict-origin-when-cross-origin unsafe-url | Specifies which referrer information to send when fetching the iframe |
| sandbox | allow-forms allow-pointer-lock allow-popups allow-same-origin allow-scripts allow-top-navigation | Enables an extra set of restrictions for the content in an <iframe> |
| src | URL | Specifies the address of the document to embed in the <iframe> |
| srcdoc | HTML_code | Specifies the HTML content of the page to show in the <iframe> |
| width | pixels | Specifies the width of an <iframe> (default width is 300 pixels) |
HTML Notes:
- In our HTML section the term “tag” and “element” are often used interchangeably to refer to both the tag used to create a page element and the element created by the tag (<p> tag = <p> element = paragraph on the page)
- HTML5 is not case sensitive; so <P> is the same as <p>, <H1> is the same as <h1>
- Global attributes can be used with all HTML tags and are therefore not mentioned on every tag page
- To write clean, readable HTML code, it is best to use indentation whereas elements within elements are indented (tabbed or spaces) to create something that looks like a project outline
- The browser will automatically remove any extra spaces and lines in your HTML code when the page is displayed
- Double quotes or single quotes can be used around HTML attribute values, but when the attribute value itself contains one form of quote, it will be necessary to use the other around the attribute
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.