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Anyone have issues if their JavaScript has "use strict" in it?

I think it’s only supported in suitescript 2.1 

So if you are running in 2.0 you may have issues. 

I think TS has emitted that by default for many years - I'm guessing even in SS 2.0 days?

Could be. I was going off this article over the differences between 2.0 and 2.1

<https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/section_158755248128.html|https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/section_158755248128.html>

&gt; ECMAScript 5 introduced strict mode. If a SuiteScript 2.0 script assigns a value to a variable without first declaring the variable using the var or const keyword, the script continues executing and no error is thrown. If a SuiteScript 2.1 script assigns a value to a variable without using the var , let, or const keyword, an error is thrown. For more information about strict mode, see Strict Mode.

<@U02QAQB104D>, I've had `noImplicitUseStrict = true` since the beginning.  The latest typescript version deprecates this flag (which I can override, but considering learning the benefits and if NetSuite can even support this).

Well, if it makes you feel any better we don't have `noImplicitUseStrict` in our tsconfig :slightly_smiling_face:

and as you know, we've been doing TS [for suitescript] for many years now