Question

58

rated 0 times [ 60] [ 2] / answers: 1 / hits: 73091 / 5 Years ago, thu, october 10, 2019, 12:00:00

When I'm trying to use spreading in typescript like:

.reduce((unique, x) => {

    unique.some(element => element.machineName === x.machineName) ? unique : [...unique, x];

}

I get warning with red marking from Visual Studio Code:

the syntax requires an imported helper named __spreadArrays



typescript version: 2.3.4

target: es5

I think in later versions this issue is fixed, but right now I can't migrate. How can I fix it?

Note: Project gets compiled fine and works. But red underlying in VS Code in annoying.

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answered 5 Years ago marib · Accepted Answer

For VS Code the notification is based on the tsLib exports.
Actually nothing bad happens without doing anything, it is just lack of typing.

Solution: Update tsLib dependency to get rid of the highlighting. In my case it was version 1.9.0. Update to 1.10.0 solved the issue.

Update: Since some time passed, it is better to update version to 2.2.0 (based on last comments) or the latest.