How to run .evaluate .then multiple times in nightmare

Question

I tried to scrape web page generated by AJAX. On the web page inside <div class='main'> are several <a class='classLinks'> elements and after click on one of them is being content generated in the same <div class='main'> and <a class='classLinks'> elements are replaced with one <a class='back'> back button.

My task is grab content generated after click on all <a class='classLinks'> elements inside <div class='main'> and write it to console log. I put all <a class='classLinks'> to the array of selectors but problem is I don't know how to run sequence ".click, .wait, .evaluate., .click" inside for cycle.

Steps are:

goto http://example.com
click on subpage
get all "a" elements
content = ""
for (i=0; i < a.lenght; i++)
{
  click on a[i]
  content = content + div.innerHTML;
  click on "a.back"
}
console.log content;

My code looks:

var content
nightmare
  .goto('http://example.com')
  .wait('.firstpage')
  .click('a.subpage')
  .wait('.main')


  .evaluate(function(){
    var links = document.querySelectorAll('a.classLinks');
         for (i = 0; i < links.length; ++i) {
        links[i].click();
        // now i need to wait for <div class='main'>
        .wait('.main')
        // and do evaluate again
        .evaluate(function(){ 
            //content is glogal variable
            content = content + document.querySelector('div.main').innerHTML;
            // and click on 'back' link becaus all a.classLinks disappeared
            document.querySelector('a.back').click();
         })
         
        
    })
    return content;
  .end()
  .then(function(content) {   
    console.log(content);
  })

Please how to process several evaluations inside for cycle in nightmare?