border-block | CSS-Tricks - CSS-Tricks
02.Iframe - Remove the Border-1
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HTML <iframe> Tag
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I'm trying to put an iframe in a div, and have the div border above it, is that possible? or any other way to do it? : r/css
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Iframes in HTML | Know 10 Amazing Tag Attributes of Iframe in HTML
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Moodle in English: CSS to hide iframe on file resource
