What are the methods of removing duplicates in JavaScrip array

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In this paper, an example is given to describe the deduplication operation of JavaScrip array. Share with you for your reference, the details are as follows:

Built-in for-of method

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Var arr= [2 pyrrine, 1 pyrrine, 1 pyrrh, 3 pyrrh, pyrrhenous, punitive, undefined, undefined.

Function uniqueUseForOf (array) {

Const temp = []; / / A temporary array

/ / the input value must exist, and the array is returned directly if the length is less than or equal to 1.

If (array & & array.length