JSFiddle - React, Tailwind, and code Playground

JavaScript

var arr = [
{id: 5, attr: 99},
{id: 7, attr: null},
{id: 2, attr: 8},
{id: 9, attr: 3},
{id: 4, attr: null}
]

var withNull = arr.filter(function (el) { return el.attr === null });
var withVal = arr.filter(function (el) { return el.attr !== null });
withVal.unshift.apply(withVal, withNull);

console.log(withVal)