Environment variables in TypeScript

Question

If we have some environment variables which are present in the environment in which the compiled JavaScript is going to run, how we can mention those variables in Typescript code ?

In TypeScript varaibles cannot be used without being declared. If it is declared like let env_varaible;, it become var env_variable; which eventually overridethe actual varaible. What is the solution for this?

during compilation typescript will show - error TS2304: Cannot find name 'env_variable'. — Jithu Rajan
– Jithu Rajan, Commented Nov 9, 2016 at 13:28

Community · Accepted Answer · 2017-05-23 12:06:58Z

2

You can tell TypeScript about a variable created by globals (coming directly from JavaScript runtime environment or any external source) with:

declare var env_variable;

Typescript won't throw an error for undeclared env_variable variable.

See also: declare global namespace variable from TypeScript

edited May 23, 2017 at 12:06

CommunityBot

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answered Nov 9, 2016 at 13:29

martin

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