tamago.js

var page = require('webpage').create();
page.open('http://www.tamagoya.co.jp/menu_list.html', function() {
  var rect = page.evaluate(function() {
    var menuDate = Array.prototype.find.call(
      document.querySelectorAll('.menutitle_date'),
      (e) => e.textContent.includes("26") );
    var menuTitle = menu_date.parentElement;
    var menuList = menuTitle.nextElementSibling
    var menuBottom = menuList.nextElementSibling
  });

  // page.viewportSize = { width: rect.width, height: rect.height };
  //the clipRect is the portion of the page you are taking a screenshot of
  page.clipRect = { top: rect.top, left: rect.left, width: rect.width, height: rect.height };

  page.render('github.png');
  phantom.exit();
});