https://www.cnblogs.com/lucm/p/11136112.html
npm安装typescript
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npm config set registry https://registry.npm.taobao.org
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npm config set disturl https://npm.taobao.org/dist
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npm -g install typescript
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如果需要指定typescript版本，则使用@符号，如下图
npm -g install typescript@3.1.3 -
转自：https://blog.csdn.net/missmecn/article/details/89375181