JSFiddle - React, Tailwind, and code Playground

JavaScript

var testes = ['exemplo.com/ola/', 'http://exemplo.com/', 'http://exemplo.com/ola/'];

function tem3BarrasA(url) {
    return url.split('/').length > 3;
}


function tem3BarrasB(url) {
    var doubleBar = url.indexOf('//');
    if (doubleBar != -1) url = url.slice(doubleBar + 2);
    return url.split('/').length > 2;
}

testes.forEach(function (teste) {
    console.log('A', teste, tem3BarrasA(teste));
    console.log('B', teste, tem3BarrasB(teste));
});