17 lines
723 B
Markdown
17 lines
723 B
Markdown
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---
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title: Construct JavaScript Objects with Functions
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localeTitle: 用函数构造JavaScript对象
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---
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使用构造函数，可以使用蓝图或构造函数轻松创建新对象。声明语法略有不同，但仍然易于记忆。
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```
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// Let's add the properties engines and seats to the car in the same way that the property wheels has been added below. They should both be numbers.
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var Car = function() {
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this.wheels = 4;
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this.engines = 1;
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this.seats = 1;
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};
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var myCar = new Car();
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```
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构造函数的名称通常以大写字母开头（与其他函数不同，后者往往以小写字符开头）。大写字母应该有助于提醒开发人员在使用该函数创建对象时使用new关键字。
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