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Чтобы убрать подсветку ошибок es6 в visual studio нужно скачать дополнения для vs node.js tools ,


In VS2015 Update-3 and NTVS 1.2 installed, simply setting TypeScript Editor as the default editor for file extension jsx did the trick for me.

1) Open Tools>Options>Text Editor>File Extension.

2) Type jsx in Extension, select TypeScript Editor as Editor, and click Apply.

http://stackoverflow.com/questions/34097915/visual-studio-2015-jsx-es2015-syntax-highlighting 
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