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can you give me an example? not sure how to use this

you could also try string.includes() - I'm not sure if that's in SuiteScript 2.1 or not

<https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes>

but `indexOf` is here <https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/indexOf>

alternatively `/needle/gi.test("haystack")`

<https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/test>

String.includes() is ES6 which is supported by SS2.1

<@UJ3DS90RM> do you have a reliable reference for which ES release contains a given feature? Mozilla used to show this but they've dropped it in favor of showing the latest ES standard which is useless for this purpose :slightly_smiling_face:

This is one of the most compact guides I could find
<https://www.greycampus.com/blog/programming/java-script-versions>

I'd be tempted to combine indexOf with the tilde symbol to make it 'truthy' or not, rather than doing the !== -1 test, but it's just style preference I guess.
var str = "thetruth";
if(~str.indexOf('truth')) {
   // it's true!
}