Chartjs-How to remove duplicate data set labels in chartjs

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You could remove duplicates from your list using this function

function remove_duplicates_safe(arr) {
    var seen = {};
    var ret_arr = [];
    for (var i = 0; i < arr.length; i++) {
        if (!(arr[i] in seen)) {
            ret_arr.push(arr[i]);
            seen[arr[i]] = true;
        }
    }
    return ret_arr;

}

You can then do something like this or make any logic you need

var listNoDuplicates = remove_duplicates_safe(this.Chart);

replace this line

for (var i = 0; i < this.Chart.length; i++) {

with this line

for (var i = 0; i < listNoDuplicates.length; i++) {

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