# 浏览器中的schemas
> 原文：[Mongoose in the browser](http://mongoosejs.com/docs/browser.html)
## 浏览器中的Mongoose
在3.9.3，Mongoose模式的声明是同构的，那就是，你可以用mongoose的浏览器组件来验证对象在浏览器中对你的mongoose模式。
包括mongoose在你的浏览器代码，你可以使用`require('mongoose')`如果你使用的是[Browserify](https://www.npmjs.com/package/browserify)或可通过script标签引入的mongoose。下面的例子使用mongoose的Amazon的[CloudFront](http://aws.amazon.com/cloudfront/) CDN。
```
<script type="text/javascript" src="//d1l4stvdmqmdzl.cloudfront.net/4.0.2/mongoose.js">
</script>
```
#### 浏览器中声明模式
When you include the mongoose.js file in a script tag, mongoose will attach a mongoose object to the global window. This object includes a Schema constructor that you can use to define schemas much like in NodeJS.
当你有一个脚本标签的mongoose.js文件，mongoose会附上mongoose对象全局窗口。此对象包含模式的构造函数，您可以使用来定义模式就像在NodeJS。
注：Mongoose的浏览器组件需要一个ECMAScript 5标准的浏览器。特别是，它不会在Internet Explorer 8或Safari 5的工作。
#### 允许你使用mongoose类型
```
var foodSchema = new mongoose.Schema({name: String});
var breakfastSchema = new mongoose.Schema({
foods: [foodSchema],
date: {type: Date, default: Date.now}
});
assert.ok(foodSchema.path('name') instanceof mongoose.Schema.Types.String);
assert.ok(breakfastSchema.path('foods') instanceof mongoose.Schema.Types.DocumentArray);
assert.ok(breakfastSchema.path('date') instanceof mongoose.Schema.Types.Date);
```
### 在浏览器中验证文档
mongoose的浏览器组件的主要目的是验证对一个给定的模式验证文档。因为mongoose浏览器组件目前不支持任何形式的查询，你负责创建自己的文档。
#### 允许您创建一个模式并使用它来验证文档
```
var schema = new mongoose.Schema({
name: {type: String, required: true},
quest: {type: String, match: /Holy Grail/i, required: true},
favoriteColor: {type: String, enum: ['Red', 'Blue'], required: true}
});
/* `mongoose.Document` is different in the browser than in NodeJS.
* the constructor takes an initial state and a schema. You can
* then modify the document and call `validate()` to make sure it
* passes validation rules. */
var doc = new mongoose.Document({}, schema);
doc.validate(function(error) {
assert.ok(error);
assert.equal('Path `name` is required.', error.errors['name'].message);
assert.equal('Path `quest` is required.', error.errors['quest'].message);
assert.equal('Path `favoriteColor` is required.',
error.errors['favoriteColor'].message);
doc.name = 'Sir Lancelot of Camelot';
doc.quest = 'To seek the holy grail';
doc.favoriteColor = 'Blue';
doc.validate(function(error) {
assert.ifError(error);
doc.name = 'Sir Galahad of Camelot';
doc.quest = 'I seek the grail'; // Invalid, must contain 'holy grail'
doc.favoriteColor = 'Yellow'; // Invalid, not 'Red' or 'Blue'
doc.validate(function(error) {
assert.ok(error);
assert.ok(!error.errors['name']);
assert.equal('Path `quest` is invalid (I seek the grail).',
error.errors['quest'].message);
assert.equal('`Yellow` is not a valid enum value for path `favoriteColor`.',
error.errors['favoriteColor'].message);
done();
});
});
});
```
