34 lines
611 B
Markdown
34 lines
611 B
Markdown
|
---
|
||
|
|
title: Declare JavaScript Objects as Variables
|
||
|
|
localeTitle: 将JavaScript对象声明为变量
|
||
|
|
---
|
||
|
|
这有一个简单的格式。您声明您的变量并使其等于`{ key: value}`形式的对象
|
||
|
|
```
|
||
|
|
var car = {
|
||
|
|
"wheels":4,
|
||
|
|
"engines":1,
|
||
|
|
"seats":5
|
||
|
|
};
|
||
|
|
```
|
||
|
|
|
||
|
|
您可以使用点表示法或括号表示法访问对象的属性。
|
||
|
|
|
||
|
|
使用点符号：
|
||
|
|
|
||
|
|
```javascript
|
||
|
|
console.log(car.wheels); // 4
|
||
|
|
```
|
||
|
|
|
||
|
|
使用括号表示法：
|
||
|
|
|
||
|
|
```javascript
|
||
|
|
console.log(car["wheels"]); // 1
|
||
|
|
```
|
||
|
|
|
||
|
|
使用动态括号表示法：
|
||
|
|
|
||
|
|
```javascript
|
||
|
|
var seatsProperty = "seats";
|
||
|
|
console.log(car[seatsProperty]); // 5
|
||
|
|
|
||
|
|
```
|