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- <!DOCTYPE html>
- <html>
- <style>
- input { color: green; }
- input.notdefault:default { color: red; }
- input.default:not(:default) { color: red; }
- </style>
- <body>
- <form id="one"></form>
- <input type="submit" form="one" class="default" id="test">
- <form id="two">
- <input type="submit" class="notdefault">
- </form>
- <script>
- document.body.offsetWidth;
- document.getElementById("test").setAttribute("form", "two");
- </script>
- </body>
- </html>
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