IE 中的 JavaScript 字体系列问题

发布于 2024-10-09 14:59:24 字数 1297 浏览 0 评论 0原文

有人能想到这在任何版本的 IE 中都不起作用的原因吗？我有一个下拉选择菜单，用于选择元素的字体系列，它调用 javascript 函数来更改字体系列。这是 html...

 <select id="selecth1FontFamily" name="selectFontFamily" onchange="updateh1family();">
                                  <option> Serif </option>
                                  <option> Arial </option>
                                  <option> Sans-Serif </option>                                  
                                  <option> Tahoma </option>
                                  <option> Verdana </option>
                                  <option> Lucida Sans Unicode </option>                               
                              </select>

这是 JavaScript...

function updateh1family() {

        var selector = document.getElementById('selecth1FontFamily');
        var cssPreviewSpan = document.getElementById('h1FontFamily');

        cssPreviewSpan.innerHTML = selector.value;
        // also update the CSS preview

        var h1 = document.getElementById('liveh1')
        h1.style.fontFamily =  selector.value;
    }

这可以改变每个浏览器中元素的字体系列，除了可怕的 Internet Explorer。有什么想法吗？我的意思是，这是一个相当简单的功能，我试图想出其他方法来实现它，但我几乎陷入困境。感谢所有阅读本文的人！

原文

Can someone think of a reason that this wouldn't work in any version of IE? I have a drop down select menu for choosing the font family of an element, which calls a javascript function to change the font-family. Here is the html...

 <select id="selecth1FontFamily" name="selectFontFamily" onchange="updateh1family();">
                                  <option> Serif </option>
                                  <option> Arial </option>
                                  <option> Sans-Serif </option>                                  
                                  <option> Tahoma </option>
                                  <option> Verdana </option>
                                  <option> Lucida Sans Unicode </option>                               
                              </select>

And here is the JavaScript...

function updateh1family() {

        var selector = document.getElementById('selecth1FontFamily');
        var cssPreviewSpan = document.getElementById('h1FontFamily');

        cssPreviewSpan.innerHTML = selector.value;
        // also update the CSS preview

        var h1 = document.getElementById('liveh1')
        h1.style.fontFamily =  selector.value;
    }

This works to change the font family of the element in EVERY browser, minus the dreaded internet explorer. Any thoughts? I mean, it is a fairly straightforward function, I tried to think of other ways to go about it but I'm pretty much stuck. Thank you to all who read this!

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玉环 2024-10-16 14:59:24

如果您调试代码，您会看到selector.value 没有返回任何内容。

<!DOCTYPE html>
<html>
<head>
</head>
<body>
  <h1 id="liveh1">Some text</h1>
  <select id="selecth1FontFamily" name="selectFontFamily" onchange="updateh1family();">
    <option> Serif </option>
    <option> Arial </option>
    <option> Sans-Serif </option>                                  
    <option> Tahoma </option>
    <option> Verdana </option>
    <option> Lucida Sans Unicode </option>                               
  </select>
    <script>
      function updateh1family() {
        var selector = document.getElementById('selecth1FontFamily');
        var family = selector.options[selector.selectedIndex].value;
        var h1 = document.getElementById('liveh1')
        h1.style.fontFamily = family;        
      }

    </script>
</body>
</html>

JSBin

If you debugged the code you would see that selector.value returns nothing.

<!DOCTYPE html>
<html>
<head>
</head>
<body>
  <h1 id="liveh1">Some text</h1>
  <select id="selecth1FontFamily" name="selectFontFamily" onchange="updateh1family();">
    <option> Serif </option>
    <option> Arial </option>
    <option> Sans-Serif </option>                                  
    <option> Tahoma </option>
    <option> Verdana </option>
    <option> Lucida Sans Unicode </option>                               
  </select>
    <script>
      function updateh1family() {
        var selector = document.getElementById('selecth1FontFamily');
        var family = selector.options[selector.selectedIndex].value;
        var h1 = document.getElementById('liveh1')
        h1.style.fontFamily = family;        
      }

    </script>
</body>
</html>

JSBin

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