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https://github.com/angular/angular-cli/issues/2221
http://stackoverflow.com/questions/31173738/typescript-getting-error-ts2304-cannot-find-name-require
https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/requirejs/require.d.ts
解决
npm install @types/node --save-dev
add tsconfig.json
{ "compilerOptions": { "types": ["node"] }}
