问题
I have this image (attached). I am not a designer but I do not want to use the image in my app. I heard you can come very close to an image using css. Can someone help me with this image and turnning into a css equivalent
thanks!
TRIED
<span class="xyz">
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<polygon points="0,0 100,0 100,40 0,40 20,20" style="fill:#46b"/>
</svg>
text
</span>
Not sure how to add that to my current css ALSO TRIED
display: block;
clear: both;
width: 70%;
height: 2%;
float:right;
margin-top: -50%;
margin-right: 2%;
border-left: 10px solid transparent;
border-top: 4px solid #546aa4;
border-bottom: 4px solid #546aa4;
Issue with above is that my text has no background anymore... if I use background-color, then I will have to use border-left: 10px solid white, which is not going to look good on different background images as this layer will sit on top on an image.
回答1:
If you have <div class="magic">, you could apply this style:
.magic {
width: 200px;
height: 50px;
}
.magic:before {
content: '.';
float: left;
width: 0;
height: 0;
border-top: 25px solid transparent;
border-left: 25px solid white;
border-bottom: 25px solid transparent;
}
Change dimensions to your own taste. This trick is called CSS Triangle.
jsFiddle Demo
EDIT: Or a quick demo with a transparent arrow - here you basically use different border colors for the tricky borders and a way to move the arrow to the left - I used position: relative - so the div's background won't cover what is underneath.
回答2:
In the sense that HTML elements can be styled, yes, a shape like that could be created. You'd have to use multiple DIVs to accomplish it. Here's a site that gives a nice overview of creating basic geometric shapes using border styles:
http://css-tricks.com/examples/ShapesOfCSS/
回答3:
With "I don't want to use an image in my app" being a rather vague requirement, you may find data URIs an appropriate alternative:
.xyz{
background:url(data:image/png;base64,/*encoded image*/);
}
I'm a big fan of using these sparingly - they remove the need of an additional http request if the image is external, they do not require as much rendering resources on the client as heavy sprites would and they are (except for most trivial cases with the graphics simpler than yours) faster to render than CSS3 effects.
Edit: base64 encoding is part of some LESS/SASS css pre-processing implementations and there are online encoders available for one-off usage, for instance this one (just remember to remove all line breaks from the data uri)
Fiddled
回答4:
If all you want to do is avoid linking to an external image file you could embed the image in your css or html directly.
Here's an example:
<!doctype html>
<html>
<head>
<title>CSS Image Data Example</title>
<style>
#imgHolder {
background-image: url(data:image/png;base64,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);
width: 200px;
height: 47px;
}
</style>
</head>
<body>
<h1>Look, Ma, no external links!</h1>
<div id="imgHolder"> </div>
</body>
</html>
In this case I used the image data URL for the background-image css property, but you could also use the same URL for the src attribute of an <img> tag.
回答5:
It seems that you want a vectorial image. You can use the HTML svg tag to create a polygon:
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<polygon points="0,0 100,0 100,40 0,40 20,20"
style="fill:#46b"/>
</svg>
http://jsfiddle.net/XDtXV/
回答6:
Here's an example to get you started:
HTML:
<div class="box">
<div class="flag"></div>
</div>
CSS:
.box {
/* Set dimensions and color of containing box */
width: 100px;
height: 30px;
background: #03e;
}
.flag {
float: left;
/* Set left border to control width and color of flag */
border-left: 20px solid #fff;
/* Set top and bottom border each to half of box height */
border-top: 15px solid transparent;
border-bottom: 15px solid transparent;
width: 0;
height: 0;
}
Fiddle link: http://jsfiddle.net/kHDFp/
回答7:
Here is a good start of what you can do.
<style>
#button {
width: 120px;
background: #546AA4;
border-left: 40px solid white;
border-top: 24px solid transparent;
border-bottom: 24px solid transparent;
}
</style>
<p id="button"></p>
See: In Action
回答8:
I've yet to see an approach using pseudo elements here, so I thought I'd add one here. This is presuming that you're giving your div a set height:
div{
height:50px;
width:200px;
position:relative;
margin-left:25px;
background:tomato;
}
div:before{
content:"";
position:absolute;
top:0;
left:-25px;
border-top:25px solid tomato;
border-left:25px solid transparent;
}
div:after{
content:"";
position:absolute;
bottom:0;
left:-25px;
border-bottom:25px solid tomato;
border-left:25px solid transparent;
}<div></div>来源：https://stackoverflow.com/questions/11977735/turning-an-image-into-css