JS 中 9 个强大主流写法(各种 Hack 写法)_WEB前端开发
在日常开发中优雅的写法可提高代码的可读性,以及使代码整洁,本篇文章介绍了9种非常主流且又优雅的写法。
首先我们来看一下实现的效果,如下图所示:
思路:
如何使用 CSS 颜色?_WEB前端开发
CSS 中颜色有多种不同的应用方式,预定义的颜色名称、rgb、rgba 以及使用十六进制颜色值,本篇文章展示的是使用预定义的颜色名称
确定事件: 文档加载完成 onload 2. 事件要触发函数: init() 3. 函数: *** 作页面的元素 要 *** 作表格中每一行 动态的修改行的背景颜色
具体代码:
<!DOCTYPE html> <html> <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" width="600px" 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> *** 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="#" 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="#" 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="#" 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="#" 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="#" 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="#" 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="#" 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="#" 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="#" 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="#" 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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解决“无法完成请求,因为它不是有效的Photoshop文档”的方法:首先在PS无法打开的图片文件上面右击,并选择“打开方式-画图”;然后在画图软件的菜单中选择“文件-另存为-BMP图片”;最后用ps软件重新打开即可。
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