69 lines
2.3 KiB
Markdown
69 lines
2.3 KiB
Markdown
---
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id: 587d7b8b367417b2b2512b50
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title: Write Concise Declarative Functions with ES6
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localeTitle: Escribir funciones declarativas concisas con ES6
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challengeType: 1
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---
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## Description
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<section id='description'>
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Al definir funciones dentro de objetos en ES5, tenemos que usar la <code>function</code> palabra clave de la siguiente manera:
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<blockquote>const person = {<br> name: "Taylor",<br> sayHello: function() {<br> return `Hello! My name is ${this.name}.`;<br> }<br>};</blockquote>
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Con ES6, puede eliminar la palabra clave de <code>function</code> y los dos puntos por completo al definir funciones en objetos. Aquí hay un ejemplo de esta sintaxis:
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<blockquote>const person = {<br> name: "Taylor",<br> sayHello() {<br> return `Hello! My name is ${this.name}.`;<br> }<br>};</blockquote>
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</section>
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## Instructions
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<section id='instructions'>
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Refactorice la función <code>setGear</code> dentro de la <code>bicycle</code> objeto para usar la sintaxis abreviada descrita anteriormente.
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: No se usó la expresión de función tradicional.
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testString: 'assert(!getUserInput("index").match(/function/),"Traditional <code>function</code> expression was not used.");'
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- text: <code class = "notranslate"> setGear </code> es una función declarativa.
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testString: 'assert(typeof bicycle.setGear === "function" && getUserInput("index").match(/setGear\s*\(.+\)\s*\{/), "<code>setGear</code> is a declarative function.");'
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- text: <code class = "notranslate"> bicycle.setGear (48) </code> cambia el valor de <code class = "notranslate"> gear </code> a 48.
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testString: 'assert((new bicycle.setGear(48)).gear === 48, "<code>bicycle.setGear(48)</code> changes the <code>gear</code> value to 48.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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// change code below this line
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const bicycle = {
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gear: 2,
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setGear: function(newGear) {
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"use strict";
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this.gear = newGear;
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}
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};
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// change code above this line
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bicycle.setGear(3);
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console.log(bicycle.gear);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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