Explain the working of timers in JavaScript? Also elucidate the drawbacks of using the timer, if any?


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Which built-in method sorts the elements of an array?

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What are exports and imports?

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Name the types of functions.

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Example of using regular expressions for syntax checking in javascript?

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hi i want validations for two dropdown lists in java script.when user enter to second dropdown list by skipping first dropdown list we should get alert box. please help me very urgent

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how to use java script

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