how to remove identical string in javascript

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Roberto
12 Nov 2018
1const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
2
3let x = (names) => names.filter((v,i) => names.indexOf(v) === i)
4x(names); // 'John', 'Paul', 'George', 'Ringo'
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