1 <!DOCTYPE html> 2 <body> 3 <style> 4 textarea:valid { 5 background-color: lime; 6 } 7 textarea:invalid { 8 background-color: red; 9 } 10 </style> 11 <script src="../resources/runner.js"></script> 12 <textarea maxlength=2147483647 id="container"></textarea> 13 <script> 14 var container = document.getElementById('container'); 15 container.focus(); 16 PerfTestRunner.measureRunsPerSecond({run: function() { 17 for (var i = 0; i < 500; ++i) 18 document.execCommand('insertText', false, 'A quick brown fox jumps over the lazy dog.\n'); 19 container.value = ''; 20 }}); 21 </script> 22 </body> 23
