check string matches from the given array of string in javascrpit

Question

i trying to match my string with given array of string but this below code is not working,is any suggestion might be help , below code is what i have tried

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Answer 1

No need to loop

let myLongString = 'jkjdssfhhabf.pdf&awersds=oerefsf';
console.log(/\.(jpe?g|pdf)/i.test(myLongString));