我遍历按钮颜色映射的每个循环都没有实现我想要的功能。当我在下面的类中包含mixin时，没有任何效果。
这是我的scss示例：
//BUTTONS
$button-colors :(
default:$base-blue,
success:$base-green,
error:$base-red,
warning:$base-orange,
info:$base-purple
);
@mixin button-styles {
display: block;
width: 100%;
border: none;
color: $base-white;
text-transform: uppercase;
font-weight: bold;
margin-bottom: 15px;
padding: 10px;
}
@mixin button-colors {
@each $button, $color in $button-colors {
.btn--#{$button} {
background-color: #{$color};
}
}
}
[class^=btn] {
@include button-styles;
@include button-colors;
}
这是我的HTML
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Circles UI Kit</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="css/styles.css">
<link rel="stylesheet" href="css/normalize.css">
</head>
<!--
List of classes used
Grid:
.container
.grid__row
.grid__col--1 *NOT USED HERE
.grid__col--2 *
.grid__col--3
.grid__col--4
.grid__col--5
.grid__col--6
.grid__col--7
.grid__col--8
.grid__col--9
.grid__col--10 *
.grid__col--11 *
.grid__col--12
.card
.centered
.theme__colors
(.grid__col--1, .grid__col--2, .grid__col--10, and .grid__col--11 are not used here in the HTML but would be good to include in the Sass)
Typography:
.container
.link
.blockquote
.headline--primary
.headline--secondary
Image:
.img--logo
.img--frame
.img--avatar
Navigation:
.nav
.nav__item
Buttons:
.btn--default
.btn--success
.btn--error
.btn--warning
.btn--info
.theme__colors
Forms:
.form
.form__label--hidden
.form__input
-->
<body class="container">
<div class="grid__row">
<div class="grid__col--3">
<a class="link" href="/">
<img class="img--logo" alt="circles logo" src="images/logo.png">
</a>
</div>
<div class="grid__col--9">
<nav role="navigation">
<ul class="nav">
<li class="nav__item"><a href="#type">Typography</a></li>
<li class="nav__item"><a href="#buttons">Buttons</a></li>
<li class="nav__item"><a href="#forms">Form</a></li>
<li class="nav__item"><a href="#images">Images</a></li>
<li class="nav__item"><a href="#grid">Grid</a></li>
</ul>
</nav>
</div>
</div>
<div class="grid__row">
<div class="grid__col--12">
<div class="card">
<p>This is what the navigation menu looks like when the screen is at 769px or higher. When the screen is less
than 769px,
the menu will be displayed vertically.</p>
</div>
</div>
</div>
<div class="grid__row">
<div class="grid__col--8">
<div class="card">
<h4 id="type" class="headline--secondary">Typography</h4>
<h1 class="headline--primary">Take a look at this amazing headline</h1>
<p>This is a typical paragraph for the UI Kit. <a href="#" class="link">Here is what a link might look like</a>.
The
typical font family for this kit is Helvetica Neue. This kit is intended for clean and refreshing web layouts.
No jazz hands here, just the essentials to make dreams come true, with minimal clean web design. The kit comes
fully equipped with everything from full responsive media styling to buttons to form fields. <em>I enjoy using
italics as well from time to time</em>.
Fell free to create the most amazing designs ever with this kit. I truly hope you enjoy not only the kit but
this
amazing paragraph as well. :)</p>
<blockquote class="blockquote">You know what really gets me going? A really nice set of block quotes. That's
right, block quotes that say, "Hey,
I'm an article you want to read and nurture."</blockquote>
</div>
</div>
<div class="grid__col--4">
<form class="form">
<legend id="forms" class="headline--secondary">Form Elements</legend>
<img class="img--avatar" src="images/avatar.png" alt="Avatar">
<label class="form__label--hidden" for="username">Username:</label>
<input class="form__input" type="text" id="username" placeholder="Username">
<label class="form__label--hidden" for="password">Password:</label>
<input class="form__input" type="password" id="password" placeholder="Password">
<button class="btn--default theme__colors" type="submit" value="Login">Login</button>
</form>
</div>
</div>
<h4 id="images" class="headline--secondary">Images</h4>
<div class="grid__row">
<div class="grid__col--6">
<img class="img--frame" src="images/image.png" alt="sample image">
</div>
<div class="grid__col--6">
<img class="img--avatar" src="images/avatar.png" alt="Avatar">
</div>
</div>
<h4 id="buttons" class="headline--secondary">Buttons</h4>
<div class="grid__row">
<div class="grid__col--12">
<button class="btn--default theme__colors">default</button>
<button class="btn--success theme__colors">success</button>
<button class="btn--error theme__colors">error</button>
<button class="btn--warning theme__colors">warning</button>
<button class="btn--info theme__colors">info</button>
</div>
</div>
<h4 id="grid" class="headline--secondary">Grid System</h4>
<div class="grid__row">
<div class="grid__col--12 theme__colors">.grid__col--12</div>
</div>
<div class="grid__row">
<div class="grid__col--6 theme__colors">.grid__col--6</div>
<div class="grid__col--6 theme__colors">.grid__col--6</div>
</div>
<div class="grid__row">
<div class="grid__col--4 theme__colors">.grid__col--4</div>
<div class="grid__col--4 theme__colors">.grid__col--4</div>
<div class="grid__col--4 theme__colors">.grid__col--4</div>
</div>
<div class="grid__row">
<div class="grid__col--3 theme__colors">.grid__col--3</div>
<div class="grid__col--3 theme__colors">.grid__col--3</div>
<div class="grid__col--3 theme__colors">.grid__col--3</div>
<div class="grid__col--3 theme__colors">.grid__col--3</div>
</div>
<div class="grid__row">
<div class="grid__col--5 theme__colors">.grid__col--5</div>
<div class="grid__col--7 theme__colors">.grid__col--7</div>
</div>
<div class="grid__row">
<div class="grid__col--8 theme__colors">.grid__col--8</div>
<div class="grid__col--4 theme__colors">.grid__col--4</div>
</div>
<div class="grid__row">
<div class="grid__col--7 theme__colors centered">.centered .grid__col--7</div>
</div>
</body>
</html>
mixin本身有问题吗？我想了解我的方法出了什么问题？通常应该在scss的mixins下编写循环，对吗？