146 lines
2.9 KiB
Markdown
146 lines
2.9 KiB
Markdown
---
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id: 587d7dbe367417b2b2512bb8
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title: Usa @if y @else para agregar lógica a tus estilos
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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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La directiva `@if` en Sass es útil para probar un caso específico: funciona igual que la sentencia `if` en JavaScript.
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```scss
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@mixin make-bold($bool) {
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@if $bool == true {
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font-weight: bold;
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}
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}
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```
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Y al igual que en JavaScript, `@else if` y `@else` prueban más condiciones:
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```scss
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@mixin text-effect($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 $val == success {
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color: green;
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}
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@else {
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color: black;
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}
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}
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```
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# --instructions--
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Crea un mixin llamado `border-stroke` que toma un parámetro `$val`. El mixin debe comprobar las siguientes condiciones utilizando `@if`, `@else if`, y `@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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Si `$val` no es `light`, `medium`, o `heavy`, el borde debe establecerse en `none`.
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# --hints--
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Tu código debe declarar un mixin llamado `border-stroke` que tiene un parámetro llamado `$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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Tu mixin debe tener una sentencia `@if` para comprobar si `$val` es `light`, y para establecer el `border` a `1px solid black`.
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```js
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assert(
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code.match(
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/@if\s+?\$val\s*?===?\s*?light\s*?{\s*?border\s*?:\s*?1px\s+?solid\s+?black\s*?;\s*?}/gi
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)
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);
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```
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Tu mixin debe tener una sentencia `@else if` para comprobar si `$val` es `medium`, y para establecer el `border` a `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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Tu mixin debe tener una sentencia `@else if` para comprobar si `$val` es `heavy`, y para establecer el `border` a `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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Tu mixin debe tener una sentencia `@else` para establecer el `border` a `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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