Add Scripting an HTML5 Web Application Using the Maqetta Editor

This article is a continuation of Implement the Dojo DateTextBox Control In an HTML5 Web Application Using the Maqetta Editor . In that tutorial, we learned how to work with Dojo DateTextBox control properties to change the date display format, wrote validation code, and got better aquainted with the Palette and Property tabs of the Maqetta editor. In today's follow up, we'll be adding the code to calculate the years of service based on the start and end dates, as well as how to control the visual aspects of our web app, including the form layout and theme.

Calculating the Years, Months, and Days

In the last instalment, we were left with a call to calcYearsMonthsAndDays() that was not fleshed out. Now it's time to delve into that, starting with the calcYearsMonthsAndDays() method:
function calcYearsMonthsAndDays(startDate, endDate) {
   var yearsOfService = dateDifference(startDate, endDate);
   dojo.byId("lblYears").innerHTML = yearsOfService[0];
   dojo.byId("lblMonths").innerHTML = yearsOfService[1];
   dojo.byId("lblDays").innerHTML = yearsOfService[2];
CalcYearsMonthsAndDays() calls a function called dateDifference() that returns a three element array consisting of the years, months, and days. Each of these date parts are then displayed in their respective labels. That part is simple enough. The real work takes place in the dateDifference() function, which I adapted from a Java method. Luckily, very few changes were required to convert it to JavaScript:
function dateDifference(d1, d2) {
  var fromDate,
  if (d1 > d2) {
      fromDate = d2;
      toDate   = d1;
  else {
      fromDate = d1;
      toDate   = d2;
  var increment = 0;
  if (fromDate.getDate() > toDate.getDate()) {
      increment = fromDate.getLastDayOfMonth();
  if (increment != 0) {   
    day = (toDate.getDate() + increment) - fromDate.getDate();
    increment = 1;
  else {      
    day = toDate.getDate() - fromDate.getDate();
  //month Calculation
  if ((fromDate.getMonth() + increment) > toDate.getMonth()) {  
    month = (toDate.getMonth() + 12) - (fromDate.getMonth() + increment);
    increment = 1;
  else {   
    month = toDate.getMonth() - (fromDate.getMonth() + increment);
    increment = 0;
  //Year Calculation
  year = toDate.getFullYear() - (fromDate.getFullYear() + increment);
  return [year, month, day];
The last date function is getLastDayOfMonth(), which I included to take advantage of JavaScript Rollovers. In a nutshell, whenever you set a date component - such as the year, month, or day - to a value that exceeds the maximum for that field type, overflowing causes the entire date to change accordingly rather than throw an error. For instance, setting a month of 12 (months are zero based) will set the date to January of the following year. Even more advantageous, is the effect triggered by setting the day to zero. It rolls back the date to the last day of the previous month, allowing us to easily determine the length of a given month:

Date.prototype.getLastDayOfMonth = function() {
   var dt = new Date(this);
   dt.setMonth(dt.getMonth() + 1);
   return dt.getDate();

Tweaking the Form Layout

The form is fully functional at this point, but we can make it look more professional through a combination of layout and CSS styling.
Dojo, always known for their impressive array of widgets, offers a control called a Border Container. Ostensibly used for page layouts that contains sidebars and/or headers, it's comprised of a center panel and four optional borders along its sides:
If we drag it into an form on the design pane, we can then place the title in the top border, the start and end date labels in the left border, the start, end date, and Calculate button controls in the center area, the Weekday info in the right panel, and the Years, Months, Days, and messages output in the bottom border. Now our form has a more esthetically pleasing layout:
Now that image of the final layout took a bit of maneuvering to arrive at. A general sizing can be arrived at by clicking on individual sections of the layout and then dragging the borders. For more fine-grained tuning, you can enter exact numbers in the layout section on the right. You can always edit the HTML markup directly by choosing the Source layout instead of Design. Alternatively, the Split-H and Split-V design layouts show both the WYSIWYG Editor and Markup panes simultaneously. In either of those modes, clicking on source code will highlight the page element that it pertains to in the Design Editor. Likewise, selecting a page element will highlight the relevant code in the Markup pane:
That can be really useful for getting a look at all of an element's properties at a glance.

Overriding a Theme

When you create a new project, Maqetta defines a CSS Theme that best suits the project type. Web Applications for instance, implement the Claro Theme (There is also a Sketch Theme). We are free to change parts of the default themes or even create a new one from scratch. Personally, I like to use the original theme as a basis for my own. To do that:
  1. Click the Create button at the top-center of the screen and select Theme... from the menu.
  2. In the New Theme dialog, select a theme to clone. For Web apps, the usual starting point is claro or claro2.
  3. Give your theme a name, and click Create to save it.
  4. To configure your theme, click the Open button, located beside Create, and choose Theme Editor... from the list.
  5. On the Open Theme dialog, select your new theme from the list and click Open.
All of the supported widgets are displayed and divided into three sections: Global Styling, Primitive Widgets and Container Widgets. Clicking on any widget selects it so that its properties can be configured in the Properties palette.
Let's change the font color for all document elements.
  1. Select the Generic text widget at the top of the editor, under Global Styling.
  2. Open the Fonts and Text section of the Properties palette.
  3. Set the font color to blue. Notice how the text for all the widgets in the editor turns blue.
  4. Click on the Save button on the toolbar to commit your changes.
Now we'll change the Selected Date color for the Calendar control.
  1. Click on a date in the Calendar widget. That will display its subwidget panel.
  2. Open the Background section of the Properties palette.
  3. Select the Color picker... from the background-color dropdown and change the color (I chose #6fc7dd [aqua]). After clicking OK, the selected date in the calendar will be updated to reflect your changes:
    4. Once again, click on the Save button on the toolbar to commit your changes.

Try It Out

Hit the Preview in Browser button in the top-right corner to view the app in the browser. Go ahead and pick a start and end date, then press the Calculate button to see the results:
Success! Retirement is just around the corner...sort of...


  1. Hi, Great.. Tutorial is just awesome..It is really helpful for a newbie like me.. I am a regular follower of your blog. Really very informative post you shared here. Kindly keep blogging. If anyone wants to become a Front end developer learn from Javascript Training in Chennai . or learn thru JavaScript Online Training in India. Nowadays JavaScript has tons of job opportunities on various vertical industry. JavaScript Training in Chennai

  2. Thank you for your post. This is excellent information. It is amazing and wonderful to visit your site.
    Arkon Web Solutions is the top & best website design company in usa . We create attractive UX and UI design as well as superb responsive web design services.

  3. I created a website a few years ago, and I was willing to provide a new look to it, so I sought Planet Web Design for seeking professional assistance. They helped me by designing an extremely beautiful website.

  4. I would like to say this is a well-informed article as we have seen here. Your way of writing is very impressive and also it is a beneficial article for us. Thanks for sharing an article like this.Maine web design company

  5. The article was up to the point and described the information very effectively. Thanks to blog author for sharing an informative post. Melbourne App development

  6. Thanks for the best blog. it was very useful for me.keep sharing such ideas in the future as well.
    Reference: V8web Faribault Website Design

  7. You have done a good job by publishing this article about Web. I appreciate your efforts which you have put into this article, It is a beneficial article for us. Thanks for sharing such informative thoughts. web design portland

  8. Your blog is really good. This information is really useful for those who have searched for this and you have great knowledge about this. I’m really impressed with your post.trance mediumship courses online

  9. Nice information, You have provided excellent data for us. It is valuable and informative for everyone. Keep posting always. I am very thankful to you. freelancer React Js developer

  10. Thanks for sharing this article here about the website design. Your article is very informative and I will share it with my other friends as the information is really very useful. Keep sharing your excellent work.Mobile Apps Development Saas In India

  11. Your blog is very valuable which you have shared here about Hire professional Web app developer online. I appreciate your efforts which you have put into this article and also it is a gainful article for us. Thank you for sharing this article here.

  12. I would like to thank you for sharing such great post about HTML5 Web Application. I got some great knowledge from this post. Keep posting. Website Designer San Antonio.

  13. I am attracted by the info which you have provided in the above post. It is genuinely good and beneficial info for us. Continue posting, Thank you. Web Design Company

  14. I generally check this kind of article and I found your article which is related to my interest. Genuinely it is good and instructive information. Thankful to you for sharing an article like this. Web Design Company Lahore

  15. I read the above article and I got some knowledge from your article. It's actually great and useful data for us. Thanks for share it. dedicated server malaysia

  16. I am attracted by the info which you have provided in the above post. It is genuinely good and beneficial info for us. Continue posting, Thank you. IT Solutions Company India

  17. Your blog is very valuable which you have shared here about.web design agency dublin I appreciate your efforts which you have put into this article and also it is a gainful article for us. Thank you for sharing this article here.

  18. I found decent information in your article. I am impressed with how nicely you described this subject, It is a gainful article for us. cloudsuite distribution electronic data interchange edi service Thanks for share it.

  19. Very well written article. It was an awesome article to read. Complete rich content and fully informative. I totally Loved it. Read more info about website agency jakarta

  20. I am attracted by the info which you have provided in the above post. It is genuinely good and beneficial info for us. Continue posting, Thank you. Graphics Design Services in India

  21. I admire this article for the well-researched content and excellent wording. web application dubai. I got so involved in this material that I couldn’t stop reading. I am impressed with your work and skill. Thank you so much.

  22. Excellent job, this is great information which is shared by you. This info is meaningful and factual for us to increase our knowledge about it. about Web Designers in Tampa So please always keep sharing this type of information.