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IE9 border-radius and background gradient bleeding

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野的像风
野的像风 2020-11-27 10:11

IE9 is apparently able to handle rounded corners by using the CSS3 standard definition of border-radius.

What about support for border radius and

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  • 花落未央
    2020-11-27 10:24

    I ran into this bug too. My suggestion would be to use a repeated background image for the gradient in ie9. IE9 correctly tiles the image behind the rounded borders (as of RC1).

    I fail to see how writing 100 lines of code to replace 1 line of CSS is simple or elegant. SVG is cool and all, but why go through all that when easier solutions for gradient backgrounds have been around for years.

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  • 半阙折子戏
    2020-11-27 10:27

    Just use a wrapper div (rounded & overflow hidden) to clip the radius for IE9. Simple, works cross-browser. SVG, JS, and conditional comments are unnecessary.

    <div class="ie9roundedgradient"><div class="roundedgradient">text or whatever</div></div>

.ie9roundedgradient { 
display:inline-block; overflow:hidden; -webkit-border-radius: 8px; -moz-border-radius: 8px; border-radius: 8px; 
}
.roundedgradient { 
-webkit-border-radius: 8px; -moz-border-radius: 8px; border-radius: 8px; 
/* use colorzilla to generate your cross-browser gradients */ 
}
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  • 日久生厌
    2020-11-27 10:28

    I have also been working with this problem. Another "solution" is to add a div around the item that has the gradient and rounded corners. Make that div the same height, width, and rounded corner values. Set the overflow to hidden. This is basically just a mask, but it works for me.

    HTML:

    <div class="mask roundedCorners">
    <div class="roundedCorners gradient">
        Content
    </div>
</div>

    CSS:

    .mask
{
    overflow: hidden;
}

.roundedCorners
{
    border-radius: 5px;
    -moz-border-radius: 5px;
    -webkit-border-radius: 5px;
}

.gradient
{
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#0065a4', endColorstr='#a0cf67',GradientType=0 ); /* IE6-9 */
}
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  • 隐瞒了意图╮
    2020-11-27 10:32

    The mask div in IE9 is a good idea. I am supplying some complete code to help clarify a bit. While I am not happy with wrapping the button in a DIV, I think it's easier to understand than embedding a PNG mask or going through all the effort using SVG. Maybe IE 10 will support it properly.

    <!DOCTYPE html>
<html>
<head>
<title>Button Test</title>
<style>
.btn_mask { cursor:pointer;padding:5px 10px;border-radius:11px 11px 11px 11px;
 background-color:transparent;-moz-border-radius:11px 11px 11px 11px;
 -webkit-border-radius:11px 11px 11px 11px;overflow:hidden;padding:0px;
 float:left; }
.btn { cursor:pointer;text-decoration:none;border:1px solid rgb(153,153,153);
 padding:5px 10px;color:rgb(0,0,0);font-size:14px;font-family:arial,serif;
 text-shadow:0px 0px 5px rgb(255,255,255);font-size:14px;
 border-radius:11px 11px 11px 11px;-moz-border-radius:11px 11px 11px 11px;
 -webkit-border-radius:11px 11px 11px 11px;box-shadow:0px 0px 0px rgb(0,0,0);
 -moz-box-shadow:0px 0px 0px rgb(0,0,0);
 -webkit-box-shadow:0px 0px 0px rgb(0,0,0);background-color:rgb(255,204,0);
 background-image:linear-gradient(-90deg,rgb(255,255,153),rgb(255,204,0));
 background-image:-webkit-gradient(linear,50% 0%,50% 100%,from(rgb(255,255,153)),to(rgb(255,204,0)));-ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorStr='#ffffff', EndColorStr='#ffcc00)')";background-image:-moz-linear-gradient(-90deg,rgb(255,255,153),rgb(255,204,0));
}
.btn:hover { cursor:pointer;text-decoration:none; border:1px solid rgb(153,153,153); padding:5px 10px 5px 10px; color:rgb(0,0,0); font-size:14px; font-family:arial,serif; text-shadow:0px 0px 5px rgb(255,255,255); font-size:14px; border-radius:11px 11px 11px 11px; -moz-border-radius:11px 11px 11px 11px; -webkit-border-radius:11px 11px 11px 11px; box-shadow:0px 0px 0px rgb(0,0,0); -moz-box-shadow:0px 0px 0px rgb(0,0,0); -webkit-box-shadow:0px 0px 0px rgb(0,0,0); background-color:rgb(255,255,0); background-image:linear-gradient(-90deg,rgb(255,255,0),rgb(255,255,153)); background-image:-webkit-gradient(linear,50% 0%,50% 100%,from(rgb(255,255,0)),to(rgb(255,255,153))); background-image:-moz-linear-gradient(-90deg,rgb(255,255,0),rgb(255,255,153)); }
</style>
</head>
<body>
<form name='form1'>
<div class='btn_mask'><input type='button' class='btn' value='a button'></div>
<div class='btn_mask'><input type='button' class='btn' value='a button'></div>
<div class='btn_mask'><input type='button' class='btn' value='a button'></div>
<div class='btn_mask'><input type='button' class='btn' value='a button'></div>
</form>
</body>
</html>
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  • 名媛妹妹
    2020-11-27 10:34

    Here's one solution that adds a background gradient, using a data URI to create a semi-transparent image that overlays any background color. I've verified that it's clipped correctly to the border radius in IE9. This is lighter weight than SVG-based proposals but as a downside, is not resolution-independent. Another advantage: works with your current HTML/CSS and does not require wrapping with additional elements.

    I grabbed a random 20x20 gradient PNG via a web search, and converted it into a data URI using an online tool. The resulting data URI is smaller than the CSS code for all that SVG mess, much less the SVG itself! (You could apply this conditionally to IE9 only using conditional styles, browser-specific css classes, etc.) Of course, generating a PNG works great for button-sized gradients, but not page-sized gradients!

    HTML:

    <span class="button">This is a button</span>

    CSS:

    span.button { 
  padding: 5px 10px;
  border-radius: 10px;
  background-color: orange;  
  background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAvUlEQVQ4y63VMQrDMAyF4d/BGJ+rhA4dOnTo0Kn3P4ExxnSoXVQhpx0kEMmSjyfiKAF4AhVoqrvqjXdtoqPoBMQAPAZwhMpaYkAKwH1gFtgG0v9IlyZ4E2BVabtKeZhuglegKKyqsWXFVboJXgZQfqSUCZOFATkAZwEVY/ymQAtKQJ4Jd4VZqARnuqyxmXAfiAQtFJEuG9dPwtMC0zD6YXH/ldAddB/Z/aW4Hxv3g+3+6bkvB/f15b5gXX8BL0z+tEEtuNA8AAAAAElFTkSuQmCC);
  background-size: 100% 100%;

  border: 2px solid white;
  color: white;
}
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  • 名媛妹妹
    2020-11-27 10:34

    Not sure if this was a one off or a valid workaround but...

    I found that provided the border-radius is greater than the border width, I didn't encounter the issue. When they were the same I was getting the square corners.

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