index.js

 const puppeteer = require('puppeteer');

let scrape = async (suburl) => {
    const browser = await puppeteer.launch({headless: false});
    // const browser = await puppeteer.launch();
    const page = await browser.newPage();

    await page.goto('https://registroapps.uniandes.edu.co/oferta_cursos/index.php/courses?prefix='+suburl+"&term=201820&ptrm=1", {waitUntil: 'networkidle0'});
    const result = await page.evaluate(() => {

        
        const valoresCupos = document.querySelectorAll('.collapsible-body.grey.lighten-3 > div.row > div.col.s4.m4  ');
        const spanList = document.querySelectorAll('.col.s12.m12.l12 > .row > .col.s12.m5.l3 > span ');
        const spanS =[];
        let contador= 0;
        for (let span of spanList){
          let spancito = span.innerHTML.trim();
          contador++;
          if(contador==4){
            spanS.push(spancito);
            
          }
          if(contador==9){
            contador=0;
          }
          
        }
        // return elements;
        
        // PARA DEBUGGING 
        
        let something = [];
        for (let element of valoresCupos){
        let elemento= element.innerHTML.trim();
         something.push(elemento);
          
        }
        return [something,spanS]; 
        
        
    });

    browser.close();
    return result;
};



scrape("CBCO").then((value) => {
  
  let nrcs= value[1];
  const data = [];
  for(i =0; i<value[0].length; i+=3){
    let temparray = value[0].slice(i,i+3);
    let capacidad = temparray[0].split(" ")[1];
    let disponible = temparray[2].split(" ")[1];

    data.push({capacidad, disponible});
  }
 
  var resultado=[];
  for(i=0; i<data.length; i++){
    let nrc = nrcs[i];
    let dataS = data[i]
    resultado.push({nrc,dataS});
  }
  console.log(resultado)
});