基于JavaScript实现表格隔行换色
表格隔行换色
需求分析
我们商品分类的信息太多，如果每一行都显示同一个颜色的话会让人看的眼花，为了提高用户体验，减少用户看错的情况，需要对表格进行隔行换色
技术分析
table对象 集合 cells[]：返回包含表格中所有单元格的一个数组。 rows[]：返回包含表格中所有行的一个数组。 tBodies[]：返回包含表格中所有tbody 的一个数组。
步骤分析
确定事件: 文档加载完成 onload 2. 事件要触发函数: init() 3. 函数:操作页面的元素 要操作表格中每一行 动态的修改行的背景颜色代码实现
<!DOCTYPE html><html lang='en'><head> <meta charset='UTF-8'> <title>Title</title> <script > function init(){ //得到表格 var tab = document.getElementById('tab'); //得到表格中每一行 var rows = tab.rows; //便利所有的行,然后根据奇数 偶数 for(var i=1; i < rows.length; i++){var row = rows[i]; //得到其中的某一行if(i%2==0){ row.bgColor = 'yellow';}else{ row.bgColor = 'red'} } } </script></head><body onload='init()'><table border='1px' id='tab'> <tr> <td> <input type='checkbox'/> </td> <td>分类ID</td> <td>分类名称</td> <td>分类商品</td> <td>分类描述</td> <td>操作</td> </tr> <tr> <td> <input type='checkbox'/> </td> <td>1</td> <td>手机数码</td> <td>华为,小米,尼康</td> <td>黑马数码产品质量最好</td> <td> <a href='https://www.haobala.com/bcjs/16677.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >修改</a>|<a href='https://www.haobala.com/bcjs/16677.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >删除</a> </td> </tr> <tr> <td> <input type='checkbox'/> </td> <td>2</td> <td>成人用品</td> <td>充气的</td> <td>这里面的充气电动硅胶的</td> <td><a href='https://www.haobala.com/bcjs/16677.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >修改</a>|<a href='https://www.haobala.com/bcjs/16677.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >删除</a></td> </tr> <tr> <td> <input type='checkbox'/> </td> <td>3</td> <td>电脑办公</td> <td>联想,小米</td> <td>笔记本特卖</td> <td><a href='https://www.haobala.com/bcjs/16677.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >修改</a>|<a href='https://www.haobala.com/bcjs/16677.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >删除</a></td> </tr> <tr> <td> <input type='checkbox'/> </td> <td>4</td> <td>馋嘴零食</td> <td>辣条,麻花,黄瓜</td> <td>年货</td> <td><a href='https://www.haobala.com/bcjs/16677.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >修改</a>|<a href='https://www.haobala.com/bcjs/16677.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >删除</a></td> </tr> <tr> <td> <input type='checkbox'/> </td> <td>5</td> <td>床上用品</td> <td>床单,被套,四件套</td> <td>都是套子</td> <td><a href='https://www.haobala.com/bcjs/16677.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >修改</a>|<a href='https://www.haobala.com/bcjs/16677.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >删除</a></td> </tr></table></body></html>
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