callbacks.md

Callbacks

WARNING: This functionality is not directly supported. Use at your own risk.

Using .run(), plain callbacks can be used to control Nightmare. The following example searches for github nightmare at Yahoo and returns the first HREF in the search results:

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

nightmare
  //load a url
  .goto('http://yahoo.com')
  //simulate typing into an element identified by a CSS selector
  //here, Nightmare is typing into the search bar
  .type('input[title="Search"]', 'github nightmare')
  //click an element identified by a CSS selector
  //in this case, click the search button
  .click('#uh-search-button')
  //wait for an element identified by a CSS selector
  //in this case, the body of the results
  .wait('#main')
  //execute javascript on the page
  //here, the function is getting the HREF of the first search result
  .evaluate(function() {
    return document.querySelector('#main .searchCenterMiddle li a')
      .href;
  })
  //end the Nightmare instance along with the Electron instance it wraps
  .end()
  //run the queue of commands specified
  .run(function(error, result) {
    if (error) {
      console.error(error);
    } else {
      console.log(result);
    }
  });

References

• Runnable callback examples
• Nightmare #516 - much of the content here was borrowed from @Mr0grog's excellent explanation.