bd68b70f3d
* fix: remove isHidden flag from frontmatter * fix: add isUpcomingChange Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com> * feat: hide blocks not challenges Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com> Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>
59 lines
1.6 KiB
Markdown
59 lines
1.6 KiB
Markdown
---
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id: 5cdafbb0291309899753167f
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title: Create a JavaScript Promise
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challengeType: 1
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forumTopicId: 301197
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---
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## Description
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<section id='description'>
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A promise in JavaScript is exactly what it sounds like - you use it to make a promise to do something, usually asynchronously. When the task completes, you either fulfill your promise or fail to do so. <code>Promise</code> is a constructor function, so you need to use the <code>new</code> keyword to create one. It takes a function, as its argument, with two parameters - <code>resolve</code> and <code>reject</code>. These are methods used to determine the outcome of the promise. The syntax looks like this:
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```js
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const myPromise = new Promise((resolve, reject) => {
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});
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```
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</section>
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## Instructions
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<section id='instructions'>
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Create a new promise called <code>makeServerRequest</code>. Pass in a function with <code>resolve</code> and <code>reject</code> parameters to the constructor.
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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: You should assign a promise to a declared variable named <code>makeServerRequest</code>.
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testString: assert(makeServerRequest instanceof Promise);
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- text: Your promise should receive a function with <code>resolve</code> and <code>reject</code> as parameters.
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testString: assert(code.match(/Promise\(\s*(function\s*\(\s*resolve\s*,\s*reject\s*\)\s*{|\(\s*resolve\s*,\s*reject\s*\)\s*=>\s*{)[^}]*}/g));
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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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```
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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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const makeServerRequest = new Promise((resolve, reject) => {
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});
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```
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</section>
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