Utilize multiple classes in inline styling within HTML

I'm trying to dynamically apply the "more" CSS class directly to an inline style tag, but I haven't had success with my current approach. Unfortunately, in my situation, I can't create a class. The method is working for <p> tags but not for...

    <script type='text/javascript'>
    function CreateCustomClass()
    {
      var css_style="{color: #900;margin-top:20px;}:hover {margin-top:0px;}";
      return css_style;
    }
    </script>
    -----
    -----
    <script type='text/javascript'>
    var css_style=CreateCustomClass();
    $('#iiffrraammee').contents().find('#newtxtid').css(css_style);
    </script>

-----
-----
<textarea class="expand close" id="newtxtid" name="ta" wrap="hard" spellcheck="false"></textarea>
javascriptjqueryhtmlcss

Answer №1

Cascading Style Sheets

.txtClass{ color: #900; margin-top:20px;}
.txtClass:hover{ margin-top:0px;}

JavaScript jQuery

$('#iiffrraammee').contents().find('#newtxtid').addClass('txtClass');

Live Example:

http://jsfiddle.net/qx2QY/

Answer №2

By using jQuery, you have the capability to modify CSS properties through its .css() function. This can be achieved by passing the desired css rules as arguments:

$('#iiffrraammee').contents().find('#newtxtid').newtxtid.css({
    'color': '#900',
    'margin-top': '20px',
});

$('#iiffrraammee').contents().find('#newtxtid:hover').newtxtid.css({
    'margin-top': '0px'
});

For more information on how to use the .css() function, refer to the official documentation.

Answer №3

To achieve this, you cannot use inline styles as they only support properties. Instead, you need to define the class properties in a .css file or within style tags and then apply this class to the DOM element.

For example:

CSS


   <style>
       .CustomClass{ color: #333; font-size: 16px;
       }
       .CustomClass:hover{ background-color: #f4f4f4;
       }
   </style>

JavaScript:

document.getElementById('myElement').classList.add('CustomClass');

Answer №4

When Javascript is placed above the HTML it intends to modify, errors can occur as it runs as soon as it appears in the html source.

If all HTML content is displayed un-formatted and then styled with CSS, the browser will first render the un-formatted html before applying changes. This can make the site appear broken and slow, leading to a poor user experience.

Jquery primarily modifies tags inline.

The :hover pseudo-selector is used in stylesheets and although it's possible to use javascript to create a stylesheet with it, this practice is not recommended for better user experience. Learn more about inline CSS here.

Inline pseudo-selectors were once considered in a working draft, but they were never implemented and do not function in modern browsers. Read more about it here.

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