js实现动态添加删除(留言板)
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介绍:仿照留言板写一个类似的实例,具有添加、删除的简单功能
思路:点击发布按钮,利用DOM操作进行元素添加【appendChild()】,点击删除按钮,利用DOM找到父节点,进行删除【removeChild()】
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style type="text/css"> .liuyan{width: 70%;height: 150px;box-sizing: border-box;border: 1px dashed aqua;margin-bottom: 15px;} .pic{width: 150px;height: 150px;float: left;} .text{width:400px;height: 150px;float: left;} .delete{height: 150px;float: left;} </style> </head> <body> <div id="demo" style="width: 65%;margin: 0 auto;"> <div> <textarea rows="6" cols="80" id="content"></textarea> <button id="submit">发布</button> </div> <div class="liuyan"> <div class="pic"><img src="img/703.jpg" width="150" height="150"></div> <div class="text">努力学习,让学习成为一种习惯</div> <div class="delete"><input type="button" name="del" value="删除" onclick="del(this)"></div> </div> <div style="clear: both;"></div> </div> <script> var demo = document.getElementById(\'demo\'); var submit = document.getElementById(\'submit\'); submit.addEventListener(\'click\',add); function add(){ var content = document.getElementById(\'content\').value; var div = document.createElement(\'div\'); div.setAttribute(\'class\',\'liuyan\'); // var div1 = document.createElement(\'div\'); var div2 = document.createElement(\'div\'); var div3 = document.createElement(\'div\'); div1.setAttribute(\'class\',\'pic\'); div2.setAttribute(\'class\',\'text\'); div3.setAttribute(\'class\',\'delete\'); div.appendChild(div1); div.appendChild(div2); div.appendChild(div3); // var img = document.createElement(\'img\'); img.setAttribute(\'src\',\'img/703.jpg\'); img.setAttribute(\'width\',\'150\'); img.setAttribute(\'height\',\'150\'); div1.appendChild(img); // var del = document.createElement(\'input\'); del.setAttribute(\'type\',\'button\'); del.setAttribute(\'name\',\'del\'); del.setAttribute(\'value\',\'删除\'); del.setAttribute(\'onclick\',\'del(this)\'); div3.appendChild(del); // div2.innerHTML = content; demo.appendChild(div); alert(\'发布成功\'); } function del(obj){ var del = obj.parentNode; var liuyan = del.parentNode; var demo = liuyan.parentNode; demo.removeChild(liuyan); } </script> </body> </html>
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