Question

为什么我将类型保留在名称空间中，而不是直接将其导出。

示例我可以做到

export interface Document {
  first_name: string
  status: Document.DocumentStatus
}

export namespace Document {
  export type DocumentStatus = 'active' | 'inactive'
}

但是我可以使用命名空间

达到相同的结果

export interface Document {
  first_name: string
  status: DocumentStatus
}

export type DocumentStatus = 'active' | 'inactive'

在这种情况下使用名称空间有什么好处？

Answer 1

根据我的经验，名称空间有助于理清接口的用途，尤其是在接口开始堆积时。

例如

    Document.Status
    Document.Content
    Document.Owner
    Person.Name
    Person.Status
    Person.Address

Answer 2

TypeScript ConcurrentModificationException（以前称为Collection.stream()，被称为“内部模块”）早于ES模块<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.6.1</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin>  <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.19.1</version> <configuration> <testFailureIgnore>true</testFailureIgnore> <suiteXmlFiles>  <suiteXmlFile>src/test/resources/testng.xml</suiteXmlFile> </suiteXmlFiles> </configuration> </plugin> </plugins> </build> <dependencies> <dependency> <groupId>org.aeonbits.owner</groupId> <artifactId>owner</artifactId> <version>1.0.8</version> </dependency> <dependency> <groupId>io.rest-assured</groupId> <artifactId>rest-assured</artifactId> <version>3.0.7</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency>  <dependency> <groupId>javax.mail</groupId> <artifactId>javax.mail-api</artifactId> <version>1.5.5</version> </dependency>  <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.5</version> </dependency>  <dependency> <groupId>org.testng</groupId> <artifactId>testng</artifactId> <version>6.14.2</version> <scope>test</scope> </dependency>  <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.4</version> </dependency> <dependency> <groupId>org.seleniumhq.selenium</groupId> <artifactId>selenium-java</artifactId> <version>3.11.0</version> </dependency>  <dependency> <groupId>org.seleniumhq.selenium</groupId> <artifactId>selenium-server</artifactId> <version>3.11.0</version> </dependency> <dependency> <groupId>ru.yandex.qatools.ashot</groupId> <artifactId>ashot</artifactId> <version>1.1</version> </dependency> <dependency> <groupId>io.github.bonigarcia</groupId> <artifactId>webdrivermanager</artifactId> <version>2.2.1</version> </dependency> <dependency> <groupId>com.relevantcodes</groupId> <artifactId>extentreports</artifactId> <version>2.41.2</version> </dependency>  <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>2.3.23</version> </dependency>  <dependency> <groupId>org.jsoup</groupId> <artifactId>jsoup</artifactId> <version>1.8.3</version> </dependency>  <dependency> <groupId>org.mongodb</groupId> <artifactId>mongodb-driver</artifactId> <version>3.0.4</version> </dependency>  <dependency> <groupId>org.xerial</groupId> <artifactId>sqlite-jdbc</artifactId> <version>3.8.11.1</version> </dependency> <dependency> <groupId>info.cukes</groupId> <artifactId>cucumber-java</artifactId> <version>1.2.5</version> </dependency> <dependency> <groupId>info.cukes</groupId> <artifactId>cucumber-junit</artifactId> <version>1.2.5</version> <scope>test</scope> </dependency>  <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.17</version> </dependency>  <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-scratchpad</artifactId> <version>3.17</version> </dependency>  <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.17</version> </dependency> <dependency> <groupId>com.vimalselvam</groupId> <artifactId>testng-extentsreport</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>com.codeborne</groupId> <artifactId>phantomjsdriver</artifactId> <version>1.2.1</version> </dependency> </dependencies> / namespace的语法，现在已经过时了。通常可以将名称空间的使用视为redundant when using ES modules。如果需要，您仍然可以将module用于组织目的，但这在很大程度上是个人选择。请注意，使用ES模块，您仍然可以将作为名称空间导入，即import，因此使用诸如export之类的引用并不依赖于使用namespace。最后，这实际上只是组织的选择。

如果将Typescript用作类型的容器，那么命名空间在Typescript中的优势是什么

2 个答案: