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TypeScript: Support numeric separators #7329
Description
Describe the bug
Numeric separators (e.g. 10_000_000) are supported in TypeScript since version 2.7. It's still an ES (stage 3) proposal, therefore it doesn't get transpiled by Babel. So you get errors like the following.
./src/FrontEnd/App.tsx
SyntaxError: ....\App.tsx: Identifier directly after number (17:14)
15 | import { reduxStore } from "./ReduxStore";
16 |
> 17 | console.log(10_000_000);
Steps to reproduce
See above.
Expected behavior
No transpile error.
Actual behavior
See above.
Reproducible demo
In any .ts/.tsx file:
console.log(10_000_000);Solution
Add the "@babel/plugin-proposal-numeric-separator" plugin to the Babel preset if TypeScript is enabled. (Just like we do it for decorators.)
Reacted by Mikhail Osher, Maciej Suchecki, Jamie Birch, David Villamizar, Boris Pallares and Martin Levett
Activity
[-]Numeric separators not supported in TypeScript[/-][+]Numeric separators not supported in TS files[/+][-]Numeric separators not supported in TS files[/-][+]TypeScript: Support numeric separators[/+]tharun208 commentedon Oct 16, 2019
Added fix in this pull Request #7817