90 lines
2.2 KiB
Markdown
90 lines
2.2 KiB
Markdown
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---
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id: 56533eb9ac21ba0edf2244cc
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title: Accessing Nested Objects
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challengeType: 1
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guideUrl: 'https://guide.freecodecamp.org/certificates/accessing-nested-objects-in-json'
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---
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## Description
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<section id='description'>
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The sub-properties of objects can be accessed by chaining together the dot or bracket notation.
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Here is a nested object:
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<blockquote>var ourStorage = {<br> "desk": {<br> "drawer": "stapler"<br> },<br> "cabinet": {<br> "top drawer": { <br> "folder1": "a file",<br> "folder2": "secrets"<br> },<br> "bottom drawer": "soda"<br> }<br>};<br>ourStorage.cabinet["top drawer"].folder2; // "secrets"<br>ourStorage.desk.drawer; // "stapler"</blockquote>
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</section>
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## Instructions
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<section id='instructions'>
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Access the <code>myStorage</code> object and assign the contents of the <code>glove box</code> property to the <code>gloveBoxContents</code> variable. Use bracket notation for properties with a space in their name.
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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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- text: <code>gloveBoxContents</code> should equal "maps"
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testString: 'assert(gloveBoxContents === "maps", "<code>gloveBoxContents</code> should equal "maps"");'
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- text: Use dot and bracket notation to access <code>myStorage</code>
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testString: 'assert(/=\s*myStorage\.car\.inside\[\s*("|")glove box\1\s*\]/g.test(code), "Use dot and bracket notation to access <code>myStorage</code>");'
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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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// Setup
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var myStorage = {
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"car": {
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"inside": {
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"glove box": "maps",
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"passenger seat": "crumbs"
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},
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"outside": {
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"trunk": "jack"
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}
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}
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};
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var gloveBoxContents = undefined; // Change this line
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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console.info('after the test');
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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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var myStorage = {
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"car":{
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"inside":{
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"glove box":"maps",
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"passenger seat":"crumbs"
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},
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"outside":{
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"trunk":"jack"
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}
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}
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};
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var gloveBoxContents = myStorage.car.inside["glove box"];
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```
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</section>
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