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javascript – noscript标签,如果没有启用,我需要提供替代的HTML

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互联网集市收集整理的这篇技术教程文章主要介绍了javascript – noscript标签,如果没有启用,我需要提供替代的HTML，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含4186字，纯文字阅读大概需要6分钟。

内容图文

如果在用户的浏览器上没有启用JavaScript,是否可以用HTML替换javascript？

我知道我可以使用< noscript>这个显示代替javascript< / noscript>

这工作正常,但它仍然运行JavaScript.

理论上我会想要这个：

如果启用了javascript
运行javascript

如果未启用javascript
不要运行javascript并提供替代方法

我正在使用这个jQuery插件：http://malsup.com/jquery/cycle/int2.html

当我在safari上禁用javascript时,它会显示所有三个项目,都在div中.插件在每个项目中淡入淡出,但如果禁用它,它会连续显示所有三个,而不会像启用javascript一样淡入淡出.

禁用javascript后,我想阻止它同时显示所有三个项目.我会告诉你看起来是什么样的,以及它在JavaScript被禁用时的作用.

禁用视图：http://i42.tinypic.com/212y1j6.png(注意它们3堆叠在彼此的顶部) – 我想阻止它发生,因为JavaScript被禁用

启用视图：http://i39.tinypic.com/9gwu3d.png

以下是项目所在div的代码：

$(document).ready(function() {
    $('#featured-programs-left').cycle({ 
        fx:     'fade', 
        speed:  'slow',
        timeout: 15000,
        next:   '#next2',
        prev:   '#prev2' 
    });
});

<div id="featured-programs-left">

<div>
    <a href="http://site.com/academics/majors/emergency_medical_technician_-_paramedic/" title="Emergency Medical Technician - Paramedic"><img src="http://site.com/images/uploads/images/emt.jpg" alt="Emergency Medical Technician - Paramedic" /></a>
    <strong>Emergency Medical Technician - Paramedic</strong>
    <p>This unique A.A.S. degree program, a partnership between College and Faxton-St. Luke&#8217;s Healthcare provides the paramedic student the education necessary to function in an</p> 
    <p><a href="http://site.com/academics/majors/emergency_medical_technician_-_paramedic/" title="Learn more about Emergency Medical Technician - Paramedic">Learn more</a></p>
</div>

<div>
    <a href="http://site.com/academics/majors/travel_tourism_hospitality_events_management/" title="Travel &amp; Tourism: Hospitality &amp; Events Management"><img src="http://site.com/images/uploads/images/hospitality_event_planning.jpg" alt="Travel &amp; Tourism: Hospitality &amp; Events Management" /></a>
    <strong>Travel &amp; Tourism: Hospitality &amp; Events Management</strong>
    <p>This program prepares students for exciting careers in the travel and tourism industry and the hospitality and events planning field. Graduates are prepared to:<br</p> 
    <p><a href="http://site.com/academics/majors/travel_tourism_hospitality_events_management/" title="Learn more about Travel &amp; Tourism: Hospitality &amp; Events Management">Learn more</a></p>
</div>

<div>
    <a href="http://site.com/academics/majors/fashion_buying_merchandising/" title="Fashion Buying &amp; Merchandising"><img src="http://site.com/images/uploads/images/fashion_merchandising.jpg" alt="Fashion Buying &amp; Merchandising" /></a>
    <strong>Fashion Buying &amp; Merchandising</strong>
    <p>This program prepares graduates for careers throughout the Fashion Industry including positions in buying, fashion merchandising, retail and wholesale sales, retail</p> 
    <p><a href="http://site.com/academics/majors/fashion_buying_merchandising/" title="Learn more about Fashion Buying &amp; Merchandising">Learn more</a></p>
</div>

</div>

div的CSS

#featured-programs-left img,
#featured-programs-right img{
    xfloat:left;
    overflow:auto;
    xclear:left;
    xwidth:351px;
    xpadding:0 5px 5px 0;
    border:0;
}

#featured-programs-left,
#featured-programs-right {
    height:625px;
    float:left;
    overflow:auto;
    clear:left;
    clear:right;
    width:100%;
    xborder:2px solid red;
}

#featured-programs-left div,
#featured-programs-right div {
    xborder:1px solid purple;
    overflow:auto;
    clear:left;
    clear:right;
    width:352px;
    height:345px;
}

#featured-programs-left {
    float:left;
}

解决方法:

有点像Ates’s solution,您可以使用Javascript来更改启用它的用户的内容.例如,假设您有一个花哨的菜单,为Javascript用户提供超级简单的导航,但对非JS用户来说却毫无价值.在HTML中将display属性设置为’none’,然后使用JS启用它.在您的情况下,如果您有不希望为非JS用户显示的内容,则可以默认隐藏它.缺点是如果浏览器关闭JS和CSS,这将无法正常工作.如果您对此感到担心,可以使用JS插入内容.

<html>
<head>
  <script>
    $(document).ready(function() {
      $('.jsok').show();
    });
  </script>
  <style>
    .jsok { display: none; }
  </style>
 </head>
 <body>
   <div class="jsok"><!-- content for JS users here--></div>
   <div><!-- content for everyone here --></div>
   <noscript><!-- content for non-js users here --></noscript>
 </body>
 </html>

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