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I just started using nightmare. I was using it on my web page for testing purpose.

I have following user interface.

menu

tab1 | tab2 | tab3 ......(dynamically generated tabs)

container div for selected tab

       selected tab data

I got the dom element which contains the menu.

I don't know to how to perform click on each tab and get the selected tab data.

After reading the docs I couldn't figure out this, neither there are any example for this.

I was able to do only this - 

var Nightmare = require('nightmare');
var nightmare = Nightmare({ show: true });

nightmare
  .goto('http://www.example.com')
  .wait('#menu')
  .evaluate(function () {
      var menuDiv = document.querySelector('div#menu.content-disp');
      var menuAnchors = menuDiv.querySelectorAll('a[href]');

      var res = "";
      for(var i =0;i<menuAnchors.length;i++){
          res+=menuAnchors[i].innerText;
      }

      return res;
  })
  .end()
  .then(function (result) {
      console.log(result)
  })
  .catch(function (error) {
    console.error('Search failed:', error);
  });

I am using nightmare version 

"dependencies": {
    "nightmare": "^2.8.1"
  }
WitVault
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1 Answers1

1

After you've built the list of anchors, you'll need to iterate over them, which with Promises is a non-trivial task. Consider the following, which iterates over your results and gets the title for each page:

nightmare.then((result) => 
  result.reduce(function(accumulator, url) {
    return accumulator.then(function(results) {
      return nightmare.goto(url)
        .wait('body')
        .title()
        .then(function(result){
          results.push(result);
          return results;
        });
    });
  }, Promise.resolve([])).then(function(results){
    console.dir(results);
});

You may want to give "Asynchronous Operations and Loops" at nightmare-examples a read. That should help you get started.

Ross
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  • That's fantastic. Your's this answer helped me http://stackoverflow.com/questions/38772060/moving-between-pages-and-scraping-as-i-go-with-nightmare/38808596#38808596. And this should be in the official read me docs on the github of nightmare - "Asynchronous Operations and Loops" at nightmare-examples. – WitVault Nov 21 '16 at 07:03
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    @WitVault I think I'll be adding a github pages branch to Nightmare and merging most if not all of `nightmare-examples` in at some point in the near future. – Ross Nov 21 '16 at 16:49
  • It would be really helpful. Are you a contributor to nightmare js? – WitVault Nov 21 '16 at 16:53
  • It's been on my mind for a couple of weeks now, and I just haven't had the chance. And to answer your question, yes. :) – Ross Nov 21 '16 at 17:03