Which HTML/CSS class should be chosen to pair with another class for compatibility with IE 6, 7, and 8?

I am struggling to create a clear div box that works seamlessly across various browsers such as Mozilla, Chrome, Opera, IE 9+, and Safari, including older versions like IE 6, 7, and 8. I have achieved success in all browsers except for IE 6, 7, and 8.

To address this issue, I followed the advice provided by @potench in this thread: How does one target IE7 and IE8 with valid CSS?. While it was helpful, I encountered difficulties implementing it in IE 6, 7, and 8 as his approach is based on selectors. My situation requires utilizing a class to target another class. Despite my attempt to use the class ie8 to select transboxBody, it did not yield the desired results:

.ie8 transboxBody{
    background-color: #fff;
    filter:alpha(opacity=60);
}

Instead, I tried selecting the second div element in my HTML:

div:second-child  {
    background-color: #fff;
    filter:alpha(opacity=60);
}

This selection should affect the following div element:

<div class="transboxHead">
    <img src="../_images/image">
    <h2>Header text</h2>
</div>

However, this method backfired as it altered the div box color in other browsers like Mozilla, Chrome, Opera, IE 9+, and Safari.

In essence, I am seeking a simpler solution. Is there a way to target a class with another class? If not, what would be the most effective approach to resolve this matter?

Kindly note that I prefer avoiding Jquery for educational purposes. I aim to achieve a clean code without unnecessary bulk from adding a Jquery function.

Below is the relevant portion of my code...

CSS:

/* Zeroes out all margins */
* {
   margin:0;
   padding:0;
}

/* Center align website */
#wrapper {
   width:47em;
   margin:0 auto;
   text-align:left;
}

body {
   text-align:center; /* For IE6 */
}

/* Background image for the website */
html, body {
    background-image:url("../_images/Background.jpg");
}

/* Top transparent box */
.transboxHead {
    background-color:rgba(255,255,255, 0.6);
    opacity: 0.6;
    border-radius: 0 0 25px 25px;
    padding: 1em;
}

/* Body transparent box */
.transboxBody {
    margin:30px 0px;
    background-color:rgba(255,255,255, 0.3);
    border-radius:25px;
    padding: 1em;
}

.ie6 transboxBody{
    background-color: #fff;
    filter:alpha(opacity=60);
}

/* Registration form styling */
.logregform li {
    margin: 10px;
    /* I added the width and height seen below to try to get it work in Chrome */
    padding:top;
    width:220px;
    height:30px;
}

/* Center fields */
.contact_form { 
    width:240px;  
    overflow:hidden; 
    padding:10px; 
}

/* Contact form styling */
.contact_form ul {
    list-style-type:none;
    list-style-position:outside;
    margin:0px;
    padding:0px;
}

HTML:

<!--[if lt IE 7 ]> <html lang="en" class="ie6">    <![endif]-->
<!--[if IE 7 ]>    <html lang="en" class="ie7">    <![endif]-->
<!--[if IE 8 ]>    <html lang="en" class="ie8">    <![endif]-->

<head> 
<meta http-equiv="X-UA-Compatible" content="IE=8">
<link type="text/css" rel="stylesheet" href="../_css/stylesheet.css"/>
</head>

<div id="wrapper">
    <div class="transboxHead">
        <img src="../_images/image">
        <h2>Header text</h2>
    </div>

    <div class="centered transboxBody">
        <div class="logregform">
                <form class="contact_form">
                    <ul>
                        <li>

                        </li>
                        <li>

                        </li>
                        <li>

                        </li>
                        <li>

                        </li>
                        <li>

                        </li>
                        <li>

                        </li>
                    </ul>   
                </form>     
        </div>
 </div>

Answer №1

Looks like there's a syntax error in your code. It appears that you forgot to include the "." before the class name.

.ie8 transboxBody{
background-color: #fff;
filter:alpha(opacity=60);
}

To correct this issue, update the CSS class definition as shown below:

.ie8 .transboxBody{
background-color: #fff;
filter:alpha(opacity=60);
}

Answer №2

If you're attempting to create a fallback for `rgba()` in Internet Explorer, using the `filter` property with opacity is not the correct approach. This method will impact all text within that element.

Instead, consider using the following code snippet for a background with `rgba()`:

    background:none;
    -ms-filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#33ffffff,endColorstr=#33ffffff);
    filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#33ffffff,endColorstr=#33ffffff);
    zoom: 1;

This serves as a fallback for `rgba(255, 255, 255, 0.2)`

Make sure to modify `#33ffffff` according to your specific requirements.

A guide on calculating `ARGB` values for `RGBA` color model


Below is the updated code:

.ie8 .transboxBody { 
   background:none;
   -ms-filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#4CFFFFFF,endColorstr=#4CFFFFFF);
   filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#4CFFFFFF,endColorstr=#4CFFFFFF);
   zoom: 1;
}

    

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