Quoting from the css-ui-3 specification (https://drafts.csswg.org/css-ui-3/#resize): > UAs may also apply [the resize property], regardless of the value of the overflow property, to replaced elements representing images or videos, such as img, video, picture, svg, object, or canvas. This does not work in Safari. Tests from the css-ui-3 test suite: img: https://test.csswg.org/harness/test/css-ui-3_dev/single/resize-008/format/html5/ svg: https://test.csswg.org/harness/test/css-ui-3_dev/single/resize-009/format/html5/ picture: https://test.csswg.org/harness/test/css-ui-3_dev/single/resize-010/format/html5/ object: https://test.csswg.org/harness/test/css-ui-3_dev/single/resize-011/format/html5/ canvas: https://test.csswg.org/harness/test/css-ui-3_dev/single/resize-013/format/html5/ video: https://test.csswg.org/harness/test/css-ui-3_dev/single/resize-014/format/html5/ (https://bugs.webkit.org/show_bug.cgi?id=79380 had previously been opened on a subset of this topic and been closed as WONTFIX, but the specification has changed since then)
<rdar://problem/32981103>