146 lines
2.8 KiB
Markdown
146 lines
2.8 KiB
Markdown
---
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id: 587d7dbe367417b2b2512bb8
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title: Use @if and @else to Add Logic To Your Styles
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challengeType: 0
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forumTopicId: 301463
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dashedName: use-if-and-else-to-add-logic-to-your-styles
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---
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# --description--
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The `@if` directive in Sass is useful to test for a specific case - it works just like the `if` statement in JavaScript.
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```scss
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@mixin make-bold($bool) {
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@if $bool == true {
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font-weight: bold;
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}
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}
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```
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And just like in JavaScript, `@else if` and `@else` test for more conditions:
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```scss
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@mixin text-effect($val) {
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@if $val == danger {
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color: red;
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}
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@else if $val == alert {
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color: yellow;
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}
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@else if $val == success {
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color: green;
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}
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@else {
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color: black;
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}
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}
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```
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# --instructions--
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Create a mixin called `border-stroke` that takes a parameter `$val`. The mixin should check for the following conditions using `@if`, `@else if`, and `@else`:
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```scss
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light - 1px solid black
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medium - 3px solid black
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heavy - 6px solid black
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```
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If `$val` is not `light`, `medium`, or `heavy`, the border should be set to `none`.
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# --hints--
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Your code should declare a mixin named `border-stroke` which has a parameter named `$val`.
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```js
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assert(code.match(/@mixin\s+?border-stroke\s*?\(\s*?\$val\s*?\)\s*?{/gi));
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```
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Your mixin should have an `@if` statement to check if `$val` is light, and to set the `border` to 1px solid black.
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```js
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assert(
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code.match(
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/@if\s+?\$val\s*?===?\s*?light\s*?{\s*?border\s*?:\s*?1px\s+?solid\s+?black\s*?;\s*?}/gi
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)
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);
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```
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Your mixin should have an `@else if` statement to check if `$val` is medium, and to set the `border` to 3px solid black.
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```js
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assert(
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code.match(
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/@else\s+?if\s+?\$val\s*?===?\s*?medium\s*?{\s*?border\s*?:\s*?3px\s+?solid\s+?black\s*?;\s*?}/gi
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)
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);
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```
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Your mixin should have an `@else if` statement to check if `$val` is heavy, and to set the `border` to 6px solid black.
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```js
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assert(
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code.match(
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/@else\s+?if\s+?\$val\s*?===?\s*?heavy\s*?{\s*?border\s*?:\s*?6px\s+?solid\s+?black\s*?;\s*?}/gi
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)
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);
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```
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Your mixin should have an `@else` statement to set the `border` to none.
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```js
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assert(code.match(/@else\s*?{\s*?border\s*?:\s*?none\s*?;\s*?}/gi));
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```
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# --seed--
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## --seed-contents--
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```html
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<style type='text/scss'>
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#box {
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width: 150px;
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height: 150px;
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background-color: red;
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@include border-stroke(medium);
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}
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</style>
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<div id="box"></div>
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```
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# --solutions--
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```html
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<style type='text/scss'>
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@mixin border-stroke($val) {
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@if $val == light {
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border: 1px solid black;
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}
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@else if $val == medium {
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border: 3px solid black;
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}
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@else if $val == heavy {
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border: 6px solid black;
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}
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@else {
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border: none;
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}
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}
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#box {
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width: 150px;
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height: 150px;
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background-color: red;
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@include border-stroke(medium);
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}
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</style>
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<div id="box"></div>
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```
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