<!DOCTYPE html><html><head><meta charset="utf-8"><title>textarea字数超过限制禁止输入</title></head><body><script src="js/jquery-1.11.3.js"></script><textarea id="area" name="ss" placeholder="请输入文本内容" style="margin-left:100px;"></textarea><p style="margin-left:100px;"><span id="text-count">0</span>/20</p><script type="text/javascript">// 字数超过限制禁止输入$("#area").on("input propertychange", function() {var $this = $(this),_val = $this.val(),count = "";if (_val.length > 20) {$this.val(_val.substring(0, 20));}count =_val.length;$("#text-count").text(count);});</script></body></html>
