JSFiddle - React, Tailwind, and code Playground

JavaScript

var foo = [{"nomeDominio":"gggg.fa"},{"nomeDominio":"rarar.fa"}];

    var newarr = [];
    for ( var i=0,j=foo.length;i<j;i++ ) {
        newarr.push( foo[i]['nomeDominio'] );
    }

console.log(newarr);