seamless When this attribute is added (it can be or removed dynamically), the content is treated as if it was part of the current page. If no value is assigned to the sandox attribute, the protection is up and none of this will be accepted. To this purpose, three new attributes were added (not necessarily compatible with any browser): sandbox To isolate the inserted content of the page, and possibly set permissions.Īllow-same-origin indicates that the linked page is regarded as having the same origin as the page that displays it.Īllow-top-navigation: allows scripts in the content to access to the DOM of the page that contains it.Īllow-forms: allows submission to forms inserted into the content.Īllow-scripts: You can run scripts in the content.
With HTML 5 an iframe can be placed in a sandbox that is completely isolated from the rest of the page. Example:īesides the generic attributes weight, height to set the dimensions, this tag also has original attributes. Its size is defined by weight and height attributes or a style sheet. We define an iframe by assigning a URL to a page containing the content to include in the src attribute. You can still include this page generated on demand in an iframe. Simply assign the src attribute in the original code, or further with JavaScript.Ījax is still essential if you want to include an HTML page created on the server based on parameters provided by the user. Regardless of the search engines, iframes allow to insert content more easily than Ajax that requires XMLHttpRequest functions. If for example you want to display the same text in all pages without triggering duplicate content signals to the robots that are becoming increasingly paranoid about it, you must place it into an iframe. For the webmaster, is a way to present content to visitors which will not be visible to search engines. Iframe was used to create dynamic content before the advent of Ajax: by assigning a content with JavaScript, you could easily change the page after loading.īut Ajax provides a more complete interaction with the server. Iframe means "inline frame", it fits into the flow of page content.
This tag was already part of the specification HTML 4 but is more developed in HTML 5 while frames, and hence the frameset tag, have now obsolete.
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