JSFiddle - React, Tailwind, and code Playground

JavaScript

var myArray = [621608617992776, 621608617992776, 10156938936550295, 621608617992776, 10156938936550295, 10156938936550295, 621608617992776, 10156938936550295];
    console.log(myArray);

    var myArrayTrimmed = [];

    for(var i in myArray){
        if(myArrayTrimmed.indexOf(myArray[i]) === -1){
            myArrayTrimmed.push(myArray[i]);
        }
    }
    console.log(myArrayTrimmed);