Nightwatch is confusing

long-tests.js

const url = 'http://foo:8000'

module.exports = {
  "The spans have the correct class": function (browser) {
    
  let spans = ['#foo', '#bar', '#a', '#really', '#long', '#list']
  
  spans.forEach(function (span) {
    browser
      .url(url)
      .waitForElementVisible(span, timeout)
      .assert.cssClassPresent(span, "active");
  });
};

tests-id-like.js

const url = 'http://foo:8000'

module.exports = {
  "The spans have the correct class": function (browser) {
    
  let spans = ['#foo', '#bar', '#a', '#really', '#long', '#list']
  
  browser
    .url(url)
    // this obviously doesn't work
    spans.forEach(function (span) {
      .waitForElementVisible(span, timeout)
      .assert.cssClassPresent(span, "active");
      
  });
};