我是sass的初学者，如果这看起来很蠢，请对不起。
本质上，我试图隔离grid__col--12并在if语句中赋予它特定的属性，并为其余列提供else分支中包含的属性。但是，这对我来说不起作用。 我该如何完成我想做的事情？
这是我的styles.scss代码：
//VARIABLES
//colors
$base-green: #71eeb8;
$base-blue: #2dcae6; //base-success: #33c052;
$base-red: #ff6666; //red
$base-orange: #ff751a; //warning
$base-purple: #8a54f7; //info
//font
$base-grey: #808080;
$base-white: #ffffff;
$sheadline-weight: 100;
@mixin flexy($dis: flex, $dir: null, $justify: null) {
display: $dis;
flex-direction: $dir;
justify-content: $justify;
@content
}
@mixin size($size) {
@if $size=='tabletup' {
@media (min-width: 768px) {
@content;
}
}
@else if $size=='desktopup' {
@media (min-width: 1024px) {
@content;
}
}
}
// **********************************************
// _grid.scss
// styles related to the grid system and
// main container.
// major grid styles have been added here for you
// but additional styling may be needed
// **********************************************
//grid base class
.grid {
&__row {
@include flexy($dir: column) {
padding: 1em 10px;
border: 1px red solid;
}
@include size(tabletup) {
flex-direction: row;
}
}
&__col {
@for $i from 1 through 12 {
&--#{$i} {
@if $i==12 {
border: 2px black solid;
flex-direction: column;
justify-content: space-evenly;
border: 2px black solid;
}
@else {
margin-top: 10px;
flex-basis: 100%;
border: 2px black solid;
@include size(tabletup) {
margin-top: 0;
flex-basis: #{$i / 12 * 100 + "%"} ;
}
}
}
}
}
}
// targets all elements with classes that begin with grid__col
[class^=grid__col] {
// grid__col + grid__col, targets two sibling columns
& + & {
// NOTE: replace with media query mixin if aiming for exceeds
@include size(tabletup) {
// add grid gutter
margin-left: 10px;
}
}
}
//gridsystem colors
$col-3: lighten($base-purple, 20%);
$col-4: lighten($base-blue, 10%);
$col-5: darken($base-green, 20%);
$col-6: darken($base-blue, 20%);
$col-7: lighten($base-red, 10%);
$col-8: lighten($base-orange, 20%);
$col-12: darken($base-green, 5%);
$grid-system: (
3: $col-3,
4: $col-4,
5: $col-5,
6: $col-6,
7: $col-7,
8: $col-8,
12: $col-12
);
%grid {
padding: 8px 0;
font-weight: bold;
color: grey;
}
@each $number,$color in $grid-system {
.grid__col--#{$number}.theme__colors {
@extend %grid;
background-color: $color;
@include size(tabletup) {
@extend %grid;
text-align: center;
}
}
}
//BUTTONS
$button-colors :(
default:$base-blue,
success:$base-green,
error:$base-red,
warning:$base-orange,
info:$base-purple
);
%btn {
// display: block;
// width: 100%;
border: none;
color: $base-white;
text-transform: uppercase;
font-weight: bold;
margin-bottom: 15px;
padding: 10px;
}
@each $button, $color in $button-colors {
.btn--#{$button} {
@extend %btn;
background-color: #{$color};
}
}
//BASE
.container {
font-family: 'Arial Narrow', Arial,sans-serif;
color: $base-grey;
padding: 5px;
font-weight: 500;
}
p {
line-height: 1.3;
}
.card {
text-align: left;
}
@mixin links($text-dec: none, $color, $font-weight: null) {
text-decoration: $text-dec;
color: $color;
font-weight: $font-weight;
@content
}
//NAVIGATION
.nav {
list-style-type: none;
padding: 0;
text-align: center;
@include size (tabletup) {
@include flexy($justify: flex-end) {
position: relative;
right: 5%;
}
}
&__item {
& a {
@include links($color: inherit) {
display: block;
margin: 8px 0;
padding: 8px 20px;
&:hover {
color: $base-white;
background-color: $base-green;
}
}
}
@include size (tabletup) {
margin-right: 20px;
}
}
}
//TYPOGRAPHY
//link
.link {
@include links($color: $base-blue, $font-weight: bold);
}
//blockquote
.blockquote {
border-left: $base-green 8px solid;
padding-left: 10px;
font-style: oblique;
font-size: 1.2em;
}
// headlines
.headline--primary {
color: $base-green;
margin-left: 10px;
}
[class*=secondary] {
font-weight: $sheadline-weight
}
.headline--secondary {
text-align: left;
}
//FORM
.form {
@include flexy($dir: column);
&__input {
border: none;
border-bottom: 2px solid $base-green;
margin-bottom: 15px;
}
&__label--hidden {
display: none;
}
}
//IMAGE
%image-styles {
display: block;
margin: 0 auto;
max-width: 100%;
padding: 8px;
}
[class^=img] {
@extend %image-styles;
}
.img--frame {
border: 2px solid $base-grey;
}
这是我的index.html代码：
<!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>
如您所知，我的代码无法正常工作，因为flex项周围的黑线显示了一行！我试图使其与if语句中的其他属性一起成为一列。我怎样才能解决这个问题？我认为如果可以的话，这样做是个好主意。
