fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"> </script> <script> i=0; $(document).ready(function(){ $("p").keypress(function(){ $("span").text(i+=1); }); $("button").click(function(){ $("p").keypress(); }); }); </script> </head> <body> <p>Keypresses: <span>0</span></p> <button>Trigger the keypress event</button> </body> </html>
运行结果