freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-bracket-notation.md

---
id: 56533eb9ac21ba0edf2244c8
title: Accessing Object Properties with Bracket Notation
challengeType: 1
videoUrl: 'https://scrimba.com/c/cBvmEHP'
forumTopicId: 16163
dashedName: accessing-object-properties-with-bracket-notation
---

# --description--

The second way to access the properties of an object is bracket notation (`[]`). If the property of the object you are trying to access has a space in its name, you will need to use bracket notation.

However, you can still use bracket notation on object properties without spaces.

Here is a sample of using bracket notation to read an object's property:

```js
var myObj = {
  "Space Name": "Kirk",
  "More Space": "Spock",
  "NoSpace": "USS Enterprise"
};
myObj["Space Name"]; // Kirk
myObj['More Space']; // Spock
myObj["NoSpace"];    // USS Enterprise
```

Note that property names with spaces in them must be in quotes (single or double).

# --instructions--

Read the values of the properties `"an entree"` and `"the drink"` of `testObj` using bracket notation and assign them to `entreeValue` and `drinkValue` respectively.

# --hints--

`entreeValue` should be a string

```js
assert(typeof entreeValue === 'string');
```

The value of `entreeValue` should be `"hamburger"`

```js
assert(entreeValue === 'hamburger');
```

`drinkValue` should be a string

```js
assert(typeof drinkValue === 'string');
```

The value of `drinkValue` should be `"water"`

```js
assert(drinkValue === 'water');
```

You should use bracket notation twice

```js
assert(code.match(/testObj\s*?\[('|")[^'"]+\1\]/g).length > 1);
```

# --seed--

## --after-user-code--

```js
(function(a,b) { return "entreeValue = '" + a + "', drinkValue = '" + b + "'"; })(entreeValue,drinkValue);
```

## --seed-contents--

```js
// Setup
var testObj = {
  "an entree": "hamburger",
  "my side": "veggies",
  "the drink": "water"
};

// Only change code below this line

var entreeValue = testObj;   // Change this line
var drinkValue = testObj;    // Change this line
```

# --solutions--

```js
var testObj = {
  "an entree": "hamburger",
  "my side": "veggies",
  "the drink": "water"
};
var entreeValue = testObj["an entree"];
var drinkValue = testObj['the drink'];
```