LayoutTests/fast/css/pseudo-invalid-form-basics.html - WebKit - Git at Google

 <!doctype html>
 <html>
 <head>
     <style>
         form {
             padding: 5px;
             margin: 2px;
             border: 1px solid black;
         }
         form:invalid {
             background-color: red;
         }
         form:not(:invalid) {
             background-color: green;
         }
     </style>
 </head>
 <body>
     <p>Test the basics of the pseudo class :invalid with the &lt;form&gt; element.</p>

     <!-- Empty form -->
     <form></form>

     <!-- Basic input as a descendant. -->
     <form>
         <input>
     </form>

     <!-- Basic input associated. -->
     <div>
         <form id="basic_input"></form>
         <input form="basic_input">
     </div>

     <!-- Required input as a descendant. -->
     <form>
         <input required>
     </form>

     <!-- Required input associated. -->
     <div>
         <form id="required_input"></form>
         <input form="required_input" required>
     </div>

     <!-- Valid required input as a descendant. -->
     <form>
         <input value="WebKit!" required>
     </form>

     <!-- Valid required input associated. -->
     <div>
         <form id="valid_required_input"></form>
         <input value="WebKit!" form="valid_required_input" required>
     </div>
 </body>
 </html>
	<!doctype html>
	<html>
	<head>
	<style>
	form {
	padding: 5px;
	margin: 2px;
	border: 1px solid black;
	}
	form:invalid {
	background-color: red;
	}
	form:not(:invalid) {
	background-color: green;
	}
	</style>
	</head>
	<body>
	<p>Test the basics of the pseudo class :invalid with the <form> element.</p>

	<!-- Empty form -->
	<form></form>

	<!-- Basic input as a descendant. -->
	<form>
	<input>
	</form>

	<!-- Basic input associated. -->
	<div>
	<form id="basic_input"></form>
	<input form="basic_input">
	</div>

	<!-- Required input as a descendant. -->
	<form>
	<input required>
	</form>

	<!-- Required input associated. -->
	<div>
	<form id="required_input"></form>
	<input form="required_input" required>
	</div>

	<!-- Valid required input as a descendant. -->
	<form>
	<input value="WebKit!" required>
	</form>

	<!-- Valid required input associated. -->
	<div>
	<form id="valid_required_input"></form>
	<input value="WebKit!" form="valid_required_input" required>
	</div>
	</body>
	</html>