我是该站点的常客,并且喜欢它!为了提供知识水平的背景知识,我在2012年秋季参加了网络编程入门课程。

目标:用Javascript编写代码(以供重用),以创建一个多列项目符号列表,其打印内容如下:

属性(这是一个标题)


Attr1 * Attr2
Attr3 * Attr4
Attr5 * Attr6


注意:Phillipe的解决方案有效。在底部给出。实现目标。

在寻找如何实现这一目标之后,我尝试了以下代码

书面代码

有问题的代码:http://jsfiddle.net/M5M8R/

 <p>Attributes
   <ul>
     <li style="float: left;">
       <ul>
         <li>Attr1</li>
         <li>Attr3</li>
         <li>Attr5</li>
       </ul>
     </li>
     <li style="float: left;">
       <ul>
         <li>Attr2</li>
         <li>Attr4</li>
         <li>Attr6</li>
       </ul>
     </li>
   </ul>
 </p>


完整代码(如果您想看到它,请放心,它不会太长!)

<!DOCTYPE html >
<html lang="en" >
<head>
    <title>
      Bullet Column Test
    </title>
    <meta charset="utf-8" />
    <style type="text/css">
    h1 {text-align:center}
    h2 {margin-bottom:0;}
    p  {margin-top:0;}
    body {color: #039; background-color: #eeff77;}
    ul{padding: 0; list-style: square;}
    </style>

    <script type="text/javascript">
      /* <![CDATA[ */

      function printBulletList(heading, headingLevel, bulletArray, noOfColsRequested) {

      //Divide number of bullets in bullet array by no of requested columns to determine
      //How many rows will be needed
        var noOfRows = Math.ceil(bulletArray.length/noOfColsRequested);

      //If no of cols requested exceeds no of bullets then set no of cols to no of bullets
        var noOfCols;
        if (bulletArray.length < noOfColsRequested)
          noOfCols = bulletArray.length;
        else
          noOfCols = noOfColsRequested;

       //Write html for heading, followed by unordered list column by column
        document.write("<p>");
        document.write("<h"+headingLevel+">"+heading+"</h"+headingLevel+">");
        document.write("<ul>");
          for (i=0; i<noOfCols; i++) {
            document.write("<li style='float:left;'>");
              document.write("<ul>");
                for (j=0; j< noOfRows; j++) {
                  //since last row may not be fully populated, do not write if reached end of bullet array
                  if ((i + noOfCols*j) < bulletArray.length)
                    document.write("<li>"+bulletArray[i+noOfCols*j]+"</li>");
                }
              document.write("</ul>");
            document.write("</li>");
          }
        document.write("</ul>");
        document.write("</p>");
        document.write("<br>");
      }
      /* ]]> */
    </script>
</head>

<body>
 <div>
 <p>Attributes
   <ul>
     <li style="float: left;">
       <ul>
         <li>Attr1</li>
         <li>Attr3</li>
         <li>Attr5</li>
       </ul>
     </li>
     <li style="float: left;">
       <ul>
         <li>Attr2</li>
         <li>Attr4</li>
         <li>Attr6</li>
       </ul>
     </li>
   </ul>
 </p>
 <br>
 <script type="text/javascript">
 /* <![CDATA[ */
 testArray = new Array("test1", "test2", "test3", "test4", "test5", "test6", "test7");
 printBulletList("Tests", 2, testArray, 4);
 /* ]]> */
 </script>
 <br>
 <br>
 </div>
</body>
</html>


问题

(1)我使用LTS(小于斜线)编写代码。在LTS中预览时效果很好,但是
当我在浏览器中打开文件时,所有项目符号都会折叠。因此,第一行显示为:

Attr * 1Attr2(Attr1的项目符号消失,而Attr2的项目符号叠加在Attr1的顶端)。请参阅上面的jsfiddle链接。

我希望这是浏览器默认CSS设置的问题。内联CSS优先于浏览器设置,因此我希望这是LTS的默认设置与未指定设置的浏览器的默认设置有关的问题。哪一个?

(2)正文中的项目符号列后面的内容将打印在项目符号列的右侧(例如,除非我在正文中手动输入其他[br],否则第二组项目符号的标题将显示在第一组项目符号的右侧。更聪明的方式?

谢谢你的帮助!





Philippe的解决方案有效!如果其他人想使用它,这是修改后的脚本。

  function printBulletList(heading, headingLevel, bulletArray, noOfColsRequested) {

  //Divide number of bullets in bullet array by no of requested columns to determine
  //How many rows will be needed
    var noOfRows = Math.ceil(bulletArray.length/noOfColsRequested);

  //If no of cols requested exceeds no of bullets then set no of cols to no of bullets
    var noOfCols;
    if (bulletArray.length < noOfColsRequested)
      noOfCols = bulletArray.length;
    else
      noOfCols = noOfColsRequested;

   //Write html for heading, followed by unordered list column by column
    document.write("<div class='wrapper'>");
    document.write("<p>");

    //Heading level 0 is used when there is no heading, and no space desired between successive
    //columns of bullets
    if (headingLevel > 0) {
      document.write("<h"+headingLevel+">"+heading+"</h"+headingLevel+">");
      document.write("<br>");
    }
    for (i=0; i<noOfCols; i++) {
      if (headingLevel > 0)
        document.write("<ul style='float: left; top-margin: 1em; bottom-margin: 1em;'>");
      else
        document.write("<ul style='float: left; top-margin: 0; bottom-margin: 0;'>");
            for (j=0; j< noOfRows; j++) {
              //since last row may not be fully populated, do not write if reached end of bullet array
            if ((i + noOfCols*j) < bulletArray.length)
              document.write("<li>"+bulletArray[i+noOfCols*j]+"</li>");
            }
      document.write("</ul>");
    }
    document.write("</p>");
    if (headingLevel > 0)
      document.write("<br>");
    document.write("</div>");
  }

最佳答案

也许我不明白这个问题,但是为什么您要使用许多ul li ul li?
http://jsfiddle.net/C9A4j/

<ul style="float: left;">
    <li>Attr1</li>
    <li>Attr3</li>
    <li>Attr5</li>
</ul>

09-30 16:38
查看更多