To find duplicate values in JavaScript, you can try to run the following code −
Example
<html>
<body>
<script>
function removeDuplicate(arr) {
var c;
var len = arr.length;
var result = [];
var obj = {};
for (c = 0; c<len; c++) {
obj[arr[c]] = 0;
}
for (c in obj) {
result.push(c);
}
return result;
}
var myArr = [10, 20, 30, 40, 10, 40, 70, 80, 70, 90];
document.write(removeDuplicate(myArr));
</script>
</body>
</html>Output
10,20,30,40,70,80,90