JSFiddle - React, Tailwind, and code Playground

JavaScript

var original = [ 1, 2, 3, 4, -1, -1 ];

var tem = original.filter(function (d) {
    return d !== -1;
});

console.log(original); // [1, 2, 3, 4, -1, -1] 
console.log(tem); // [1, 2, 3, 4]